Final Exam Flashcards
Sensory Receptors
Function of Cochlea
This is the transformer for the ear because it transforms vibrations into nerve impulses. The vibrations are passed along from the stirrup to the fluid inside the cochlea. Tiny hairs in the cochlea (cilia) are stimulated by the vibrations. Each hair reacts to its own frequency to determine pitch and more hairs are stimulated as a sound gets louder. Vibrations are transformed into nerve impulses that are sent through the auditory nerve and to the brain for analysis.
Sensory Receptors
Function of Semicicular Canals
They are three rings filled with fluid and each oriented along a different axis (x, y and z). When movement takes place, the information on the body’s orientation (balance) is captured by receptor cells that react to the motion of the liquid inside the canals. This information travels through the vestibular nerve to the cerebellum for interpretation.
Sensory Receptors
Function of Vestibule
It is the entrance to the cochlea and contains nerve cells that detect body position and are sensitive to gravity The cells produce nerve impulses that are sent to the cerebellum to help keep our bodies balanced.
Sensory Receptors
Function of Eustachian Tube
Also part of the middle ear, this channel is used to balance out the air pressure on either side of the ear drum so that the ear drum can vibrate properly.
Sensory Receptors
Function of Ossicles
The smallest bones in the body that transmit vibrations from the ear drum to the inner ear. Vibrations are transmitted from the ear drum, to the hammer, to the anvil, to the stirrup and finally to the liquid in the inner ear.
Sensory Receptors
Function of Ear Drum
Part of the middle ear, it is a sensitive tissue that vibrates when stimulated by a sound wave. It transmits the vibrations to the ossicles.
Sensory Receptors
Function of Auditry Canal
It is also part of the outer ear and it carries sound to the ear drum. It secretes cerebum (wax) to protect the ear drum from small insects, bacteria and dust.
Sensory Receptors
Function of Pinna
The pinna captures sound and is part of the outer ear.
Sensory Receptors
Name the parts of the ear:
- Pinna
- Auditory Canal
- Ear Drum
- Ossicles
- Eustachian Tube
- Vesitibule
- Semicircular Canals
- Cochlea
Nervous System
Decribe a voluntary nerve impulse:
Voluntary nerve impulses:
Have to travel up to your brain for interpretation, unlike involuntary nerve impulses…
Nervous System
Decribe a involuntary nerve impulse:
Reflexes
Reflexes don’t have to travel up to your brain for interpretation and for this reason, they happen quickly. A reflex action involves a simple nervous pathway called a reflex arc (see above). It starts off with receptor cells being excited and then sending a signal along a sensory nerve to the spinal cord, which then passes it along to a motor nerve. A muscle receives the signal and contracts.
Nervous System
What is the function of nerves?
The transmission of nerve impulses.
Nervous System
What is the role of the peripheral nervous system? Simplified:
Transportation of nerve impulses from the senses to the brain, and from the brain to the muscles.
Nervous System
What is the role of the peripheral nervous system?
The peripheral nervous system is divided into two main parts: Autonomic nervous system (ANS): Controls involuntary bodily functions and regulates glands. Somatic nervous system (SNS): Controls muscle movement and relays information from ears, eyes and skin to the central nervous system.
Nervous System
What is the role of the central nervous system?
It controls intelligence, memory, personality, emotion, speech, and ability to feel and move.
Nervous System
Idenitify the parts of the nervous system:
- Brain
- Cerebellum
- Brain Stem
- Spinal Cord
Materials
What are the properties of metals?
- Thermal conductivity
- Electrical conductivity
- Malleablity
- Ductility
Materials
Explain the property of resilience in relationship to wood:
When wood has adequate moisture content it is resilient and resistant to breakage. When wood is dry , it breaks easily.
Materials
Explain the property of resilience in relationship to wood:
When wood has adequate moisture content it is resilient and resistant to breakage. When wood is dry , it breaks easily.
Materials
Explain the property of elasticity in relationship to wood:
Wood usually has good elasticity. It can suffer many impacts without becoming permanently deformed. Defects and rot in wood will reduce its elastcity.
Materials
Explain the property of hardness in relationship to wood:
As the name suggests hardwood is harder than softwood. Healthy trees have a highe rlevel of hardness. Moisture content and cold temperatures also increase hardness. Rots also effects hardness.
Materials
What are the properties of wood?
- Hardness,
- Elasticity,
- Relisience,
- Tensile Strength,
Materials
What is fiberboard?
A type of modified wood:
* Made by: first separating wood fibers, using smaller bits than those used to make other modified wood. Fibers are then bonded with various products.
* Uses: insulation, floating floors, furniture, various kinds of construction.
Materials
What is particleboard?
A type of modified wood:
* Made by: bonding the particles (of woodchips and woodwaste produced by wood and plywood industries) using various chemicals.
* Uses: trunks, toys, building construction.
Materials
What is plywood?
A type of modified wood:
* Made by: gluing small large sheets of wood together so that the fibers of one are at right angles to those below them.
* Uses: work tables, building construction – primarily floors
Materials
What is laminated wood?
A type of modified wood:
* Made by: gluing small pieces of wood together.
* Uses: snowshoes, building structures, tables
Materials
What is treated wood?
A type of modified wood:
* Made by: heating wood to a high temperature or dipping in a copper based chemical product.
* Uses: Objects are structures where corrosion resistance is important – exposed to rain or snow
Materials
What is modified wood?
Treated wood or wood mixed with other substance:
* Wood chips and sawdust are pressed or glued together
* Better properties that naturel wood - - - more rigid etc.
* Examples include: plywood, particle board, fiberboard
Changes
How to determine final volume of particles in a substance in a solid, liquid, or gaseous form?
What is the equation?
(C1)(V1) = (C2)(V2)
Changes
Define Radiant Energy
It is the form of energy contained in light and other electromagnetic waves.
Changes
Define Radiant Energy
It is the form of energy contained in light and other electromagnetic waves.
Changes
Define Thermal Energy
It is a form of energy cause by the motion of the particles in matter.
Changes
Define Mechanical Energy
It is a form of energy related to motion.
Changes
Define Chemical Energy
It is a form of energy found in the bonds that keep the atom of a molecule together.
Changes
What are the 4 forms of energy?
- Chemical Energy
- Mechanical Energy
- Thermal energy
- Radiant Energy
Changes
Arrangement of particles in a gas:
The particles in gases are widely spaced and randomly arranged, meaning they can be easily compressed or squashed. The particles in a gas have enough energy to overcome the forces of attraction between the particles, so are free to move in any direction.
Changes
Arrangement of particles in a liquid:
In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.
Changes
Arrangement of particles in a solid:
In a solid, the particles pack together as tightly as possible in a neat and ordered arrangement. The particles are held together too strongly to allow movement from place to place but the particles do vibrate about their position in the structure.
Changes
Explain dilution in terms of concentration and voume:
Dilution is the addition of solvent, which decreases the concentration of the solute in the solution. Concentration is the removal of solvent, which increases the concentration of the solute in the solution.
- Dilution = more solvent, less solute
- Concentration = less solvent, more solute
Changes
What is particle model?
Atoms are connected by a line or touching.
Changes
Define ‘Joule’
The unit of measurement for energy.
Changes
Define the particle model:
A means of representing the beheaviour of matter
Cardiovascular System
Main role of the circulatory system:
The circulatory system delivers oxygen and nutrients to cells and takes away wastes. The heart pumps oxygenated and deoxygenated blood on different sides.
Gas exchange, carries nutrients and oxygen.
Cardiovascular system
What are viens?
- Less elastic than arteries
- Lowers blood pressures
- returns blood to the heart
- valves - one way
- viens need help from muscle contractions
Cardiovascular system
What are capillaries?
- Small blood vessels
- Walls - one row of cells
- Diffusion, absorbs nutrients & o2
- carry WBC
Cardiovascular system
What are arteries?
- Thick muscular walls (pressure enduring)
- Largest artery = aorta
- Smoothe interior
- Take blood out of the heart
- Divides into smaller arteries – aterioles — capillariesx
Cardiovascular system
Heart is
- muscle
- pump
- 60+ contractions / min
- size of fist
- between lungs
- protected by rib cage
Cardiovascular system
What is the circulatory system made of
Review Drawing in notes min. 10x
- blood vessels: Capillaries, viens, arteries.
- blood
Cardiovascular System
What are White Blood Cells?
- Only blood cells with a nucleus
- Rounded shape
- Bigger than red blood cells
- Few in quantity that red blood cells
Increases with infection - Protect
- Neutralize pathogens
Bacteria and viruses - Destroy dead / damaged cells
Cardiovascular System
What are red blood cells?
Produced where…
- Most common solid component of blood
- Biconcabe shape; flexible
- turn sharp corners
- squeeze into small blood vessels (capillaries)
- If deformed (sickle cell anemia)
accumalate
block blood flow (clot) - Live approx. 120 days
- constantly produced in bone marrow
- contain hemoglobin
Proteins
Transports o2
Gives blood its colour - Reaches alveoli:
Gas exchanged co2 – o2
o2 = Bright red
co2 = Dark red (brownish)
Represented as blue, ITS NOT
Cardiovascular System
How do platelets work?
Accumulate in damaged blood vessel
Produce fibrous filaments (to seal the wound).
Cardiovascular System
What are platelets?
- Pieces of blood cells
- No defined shape
- No nucleus
- Life span of approx. 10 days
- Form scabs
Cardiovascular System
Percentages of each component in the blood?
- 55% Plasma
- 45% Red Blood Cells
- Less than 1% White Blood Cells
- Less than 1% Platelets
Cardiovascular System
What is plasma?
Liquid component of blood
Mostly water
Transports
* RBC,
* WBC,
* Platelets,
* Nutrients,
* Antibodies,
* Hormones,
* Waste (Urea, co2)
Respiratory System
Read NOTES
Not a question. Every time yoh recieve this question, reread notes.
Read notes once - 1
Read notes twice - 2
Read notes 3x - 3
Read notes 4x - 4
Read notes 5x or + - 5
Respiratory System
Explain the function of the Alveoli:
7
- Small bags surrounded by capillaries
- Gas Exchange
- Around 300 million
- Alveoli & Capillaries have very thin membranes
Respiratory System
Explain the function of the Bronchioles:
6
- Divide progressivley until ending in alveoli.
Respiratory System
Explain the function of the Bronchi:
5
- Trachea splits into 2 bronchi – left and right
- Made with cartiage
- Cila and mucous
Respiratory System
Explain the function of the Trachea:
4
- Connects Layrynx to bronchi
- Tube
- Aiway
- Rings of cartilage
- Lined with mucous and cila
Respiratory System
Explain the function of the larynx:
3
- Mostly cartilage
- Connects pharynx to trachea
- Epigolottis - door
- Voice box - Air vibrations
Respiratory System
Explain the function of the pharynx:
2
- Part of the digestive system and the respiratory system
- Passage for air and food
Respiratory System
Explain the function of the nasal cavities:
1
- Air goes in
- 2 chambers in the nose
- Cila, filter dust etc.
- Blood vessels - warm air
- Muscous, moistens air
Respiratory System
Explain the role of the respiratory system:
Gas exchange, exhaling carbon dioxide, repleninshing / inhaling oxygen.
Respiratory System
Name the main parts of the respiratory system:
- Nasal Cavities
- Pharynx
- Larynx
- Trachea
- Bronchi
- Bronchioles
- Alveoli
Digestive System
What is peristalsis?
Explain
The involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wave-like movements that push the contents of the canal forward.
Digestive System
What is churning?
Explain
(with reference to liquid) move or cause to move about vigorously.
In other words mixing!
Digestive System
What is the purpose and function of Liver glands?
Explain
The liver (gland) secretes bile which is stored in the gall bladder and emulsifies fats (separates fats from water) (physical transformation).
Digestive System
What is the purpose and function of Pancreatic glands?
Explain
The pancreas secretes pancreatic juices that break down carbohydrates into smaller molecules of glucose (chemical transformation).
Digestive System
What is the purpose and function of Intestinal glands?
Explain
When food enters the small intestine, the
intestinal glands secrete intestinal juices that transform proteins into amino acids and fats into smaller molecules like glycerol (chemical transformations).
Digestive System
What is the purpose and function of Intestinal glands?
Explain
When food enters the small intestine, the
intestinal glands secrete intestinal juices that transform proteins into amino acids and fats into smaller molecules like glycerol (chemical transformations).
Digestive System
What is the purpose and function of gastric glands?
Explain
Gastric juices that come from the glands along the stomach’s walls help to break down proteins (chemical transformation). In addition to breaking down food, gastric juices also help kill bacteria that might be in the food.
Digestive System
What is the purpose and function of salivary glands?
Explain
Salivary glands (a gland is a group of cells that produce secretions) produce saliva. Each day, these glands secrete (make) 1 to 1.5 L of saliva. Saliva helps to transform the complex molecules in carbohydrates in to simpler molecules (chemical transformation). It also has antibacterial properties.
Digestive System
Name all the glands:
Explain
- Salivary glands
- Gastric glands
- Intestinal glands
- Pancreatic juices
- Liver glands
Digestive System
Name all the glands:
Explain
- Salivary glands
- Gastric glands
- Intestinal glands
- Pancreatic juices
- Liver glands
Digestive System
What is the function of the large intestine?
Explain
This is where most water, vitamins and minerals are absorbed into the bloodstream. Removing water from a liquid mixture transforms it into solid waste that is later expelled through the anus (physical transformation). The walls of the large intestine are lined with mucous that acts as lubrication to facilitate the passage of solid waste.
Digestive System
What is the large intestine?
Explain
The large intestine is about 6.5 cm in diameter and 1.5 m in length.
Digestive System
What transformations occur in the small intestine? Glands, secretions etc.
Explain
Both physical and chemical.
* When food enters the small intestine, the intestinal glands secrete intestinal juices that transform proteins into amino acids and fats into smaller molecules like glycerol (chemical transformations).
* The liver (gland) secretes bile which is stored in the gall bladder and emulsifies fats (separates fats from water) (physical transformation).
* The pancreas secretes pancreatic juices that break down carbohydrates into smaller molecules of glucose (chemical transformation).
* The small intestine also churns and moves the food along through peristalsis (physical transformation).
Digestive System
What is the small intestine lined with?
The small intestine is lined with microscopic folds (villi) to increase the surface area through which various nutrients can be absorbed into the bloodstream.
Digestive System
Small Intestine: what is it?
The small intestine is a 3 m long muscular tube that has a diameter of 2 cm. It is folded several times and attaches to the large intestine.
Digestive System
Stomach, how does it work?
- Mixes, churns and mashes food in to balls of bolus (mush).
- Gastric juices from the glands along the stomach walls help to break down proteins and kill bacteria (chemical change).
- Stomach wall is lined with mucous to protect it from is own acids.
Digestive System
Stomach, Functions
Purposes
- Store food that has been eaten
- Break down larger molecules to simpler ones
- Slowly empties mixture into small intestines
Digestive System
Esophagus, Function and structure
Like a pipe (around 10 inches long). Moves food from back of throat to stomach by muscle contractions, known as peristalsis (physical change).
Digestive System: Hints Secreted by, has ______ properties, function.
Saliva more in-depth
Saliva is secreted by the salivary gland. The purpose of saliva is to break down carbohydrates, however it also acts as a anti-bacterial.
Digestive System
Mouth, Parts and Functions
- Teeth (break apart food, physical change)
- Tongue (moves food around and breaks it apart, physical change)
- Saliva (Breaks down Carbohydrates, chemical change)
Digestive System
Name the Components of the Digestive:
- Mouth
- Esophagus
- Stomach
- Small Intestine
- Large Intestine
Digestive System
What food contains a significant source of fibre? Name 5.
- Beans
- Broccoli
- Berries
- Avocados
- Popcorn
- Whole Grains
- Apples
- Dried Fruits
Digestive System
What food contains a significant source of Minerals? Name 5.
- Meat
- Cereals
- Fish
- Milk and Dairy
- Fruits
- Vegetables
- Nuts
Digestive System
What food contains a significant source of vitamins? Name 5.
- Animal fats (A, D, E, and K)
- Vegetable oils (A, D, E, and K)
- Dairy products (A, D, E, and K)
- Liver (A, D, E, and K)
- Oily fish (A, D, E, and K)
- Fruits (C&B)
- Vegetables (C&B)
- Grains (C&B)
- Milk and Dairy (C&B)
Digestive System
What food contains a significant source of proteins? Name 5.
- Eggs
- Chicken
- Beef
- Pork
- Fish
- Nuts
- Seeds
- Beans
- Peas
- Lentils
- Tofu
Digestive System
What foods contain a significant source of fats? Name 5.
- Red Meat
- Butter
- Cheese
- Ice cream
- Avocados
- Fish
- Whole eggs
- Chia Seeds
- Dark Chocolate
Digestive System
What foods contain a significant source of carbohydrates?
- Breads
- Grains
- Pasta
- Nuts
- Legumes
- Starchy Vegetables
- Milk
- Yogurts
- Fruits
Digestive System
What function does fibre serve us?
It cleans the digestive system.
Digestive System
What function does water serve to us?
A pure substance that makes up 60% of the body. It is important to many chemical reactions, regulates metabolism, and helps to carry substances to different parts of the body.
Digestive System
What function do minerals serve to us?
They are simple chemical elements. Minerals make up various tissues like cartilage, teeth, bones, and nerves.
Digestive System
What function do vitamins serve to us?
They are vital for various body functions and to help regulate metabolism and chemical reactions in the body. There are 13 kinds of vitamins.
Digestive System
What function do proteins serve us?
They are big molecules made of long chains of amino acids. They allow the body to repair and build cells. They also provide energy when there are not enough fats or carbohydrates.
Digestive System
What function do fats serve us?
They provide the body with energy and store it. They also insulate the body and protect vital organs. Fats that come from an animal source are called saturated fats. Saturated fats can raise the cholesterol level if eaten in large quantities. Unsaturated fats come from plant sources and are a healthier source of fats.
Digestive System
What function do carbohydrates serve to us?
They contain starches or other substances that release sugars during digestion. They are quickly transformed into energy by the body.
Digestive System
Name the nutrients we need:
- Carbohydrates
- Fats
- Proteins
- Vitamins
- Minerals
- Water
- Fibre (Not a nutrient)
Organization
What is a hetergeneous mixture?
A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. A phase is any part of a sample that has a uniform composition and properties. By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases.
Organization
What is a homogenous mixture?
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. All solutions would be considered homogeneous because the dissolved material is present in the same amount throughout the solution.
Organization
Explain the difference between elements and compounds.
Elements are pure substances which are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions.
Organization
Define a pure substance:
Substance made up of a single type of atom or molecule
Solutions
Solute
Vocabulary
Minor component is a solution
(Dissolve-d)
Solutions
Solution
Vocabulary
“A mixture in which the minor component (solute) is uniformly distributed withiun the major component (solvent)”.
Solutions
Solvent
Vocabulary
Major component is a solution
(Dissolve-r)
Solutions
Saturation
Vocabulary
Max. potential for a solute to dissolve within a solvent.
Solutions
Converting Units!
mL to L & kg to g & mg to g & mL to g
mL / 1000 = L
kg x 1000 = g
mg / 1000 = g
mL = g
Solutions
Formula for concentration
c=m/v
c - concentration (g/L)
m - mass (g)
v - volume (L)
Solutions
Expressing a solution as a percent:
Shows amount of solute per 100 mL of solution. (Displayed as a percent)
Solutions
Expressing Concentration
- g/L
- %
Solutions
What is concentration?
- Ration between a solute and solution
- Higher concentration = more solute or less solution
- Lower concentration = less solute or more solution
Characteristic Properties
Solubility and Temperature
- Higher Temperature – More Soluble
- Lower Temperature – Less soluble
Characteristic Properties
Define Solubility
In chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.
Charcteristic Properties
Formula for Density
Mass/Volume = Density
g/mL = Density
Charcteristic Properties
Define Density
Degree of consistency measured by the quantity of mass per unit volume.
Materials
List the types of other Properties:
Physical Properties
- Thermal conductivity
- Electrical conductivity
- Boiling point
- Melting point
- Freezing point
Materials
List the types of Mechanical Properties:
- Hardness (resists penetration)
- Elasticity (returns to original shape)
- Resilience (resists physical impacts)
- Ductility (stretches without breaking)
- Malleability (flattens or bends without breaking)
- Tensile strength (resists tension, elastic)
Materials
What is a Mechanical Property?
A mechanical property determines how a material will react when it is subjected to one or more mechanical constraints.
Mechanical Engineering: Function,Components,Use of Motion Transformation
Slider-crank mechanism
(Systems)
- Contains a crank, slider, and guide.
- Reversible, crank and slider can switch which is driver/driven
- Crank rotates like wheels, slider translates like a piston
- Motion Transformation System : Rotation - translation (& vice versa)
- Should be lubricated
Mechanical Engineering: Function,Components,Use of Motion Transformation
Cam and follower system
(Systems)
- Contains a cam (egg shaped piece), and a follower (a stick that bobs).
- NOT Reversible, Cam is ALWAYS driver
- *Follower follows…lol…. It is driven.
- Cam rotates, Follower translates
- Motion Transformation System : Rotation - translation
- Should NOT be lubricated
Mechanical Engineering: Function,Components,Use of Motion Transformation
Screw-Gear System
(Systems)
- Contains a screw and a nut
- Irreversible; nut rotates and transforms into the translational motion in the screw. The nut it always the driver
- Motion Transformation System : Rotation - translation
- Should be lubricated
Mechanical Engineering: Function,Components,Use of Motion Transformation
Rack and Pinion system
(Systems)
- Contains at least one gear called a pinion, and a straight, teethed bar called a rack,
- Reversible
- Motion Transformation System : Rotation - translation (& vice versa)
- Should be lubricated
Mechanical Engineering: Function,Components,Use of Motion Transformation
Name the motion transformation systems:
(Systems)
- Rack and Pinion
- Screw-Gear
- Cam & Follower
- Slider Crank
Mechanical Engineering: Function, Components, Use of Motion Transmission
Speed Change!
(Systems)
Increase: Driver is bigger/has more teeth than driven
Decrease: Driven is smaller/has less teeth than driven
No Change: Driver and driven are the same in size/teeth
Mechanical Engineering: Function, Components, Use of Motion Transmission
Wheel and Worm-Wheel System
(Systems)
- Components of a wheel and worm-wheel system include a worm-wheel (screw), whose rotation is transmitted to one or more wheels.
- In a wheel and worm-wheel system both the wheel and worm-wheel both rotate in the same direction.
- NOT reversible, the worm-wheel is ALWAYS the driver
- Motion Transmission system: rotation - rotation
- Should be lubricated
Mechanical Engineering: Function, Components, Use of Motion Transmission
Belt and Pulley system
(Systems)
- Components of a belt and pulley system include pulleys (gears without teeth), and a belt.
- In a belt and pulley system pulleys within the belt turn one way, and pulleys outsides the belt turn the opposite direction.
- Reversible
- Motion Transmission a system: rotation - rotation
- Should NOT be lubricated
Mechanical Engineering: Function, Components, Use of Motion Transmission
Friction gear system
(Systems)
- Components of a friction gear system include and driver, and a follower, sometimes they also include intermediates.
- In a friction gear system each gear turns opposite in direction to the gear(s) directly beside it
- Reversible
- Motion Transmission system: rotation - rotation
- Should NOT be lubricated
- Diameter = teeth (equivalent to gear train)
Mechanical Engineering: Function, Components, Use of Motion Transmission
Chain and Sprocket systems:
(Systems)
- Components of a chain and sprocket system include gears, and a chain .
- In a chain and sprocket system gears within the train turn one way, and gears outsides the chain turn the opposite direction.
- Reversible
- Motion Transmission system: rotation - rotation
- Should be lubricated
Mechanical Engineering: Function, Components, Use of Motion Transmission
Gear Train:
(Systems)
- Components of a gear train include and driver, and a follower, sometimes they also include intermediates.
- In a gear train each gear turns opposite in direction to the gear(s) directly beside it
- Reversible
- Motion Transmission system: rotation - rotation
- Should be lubricated
Mechanical Engineering: Function, Components, Use of Motion Transmission
Name the motion transmission systems:
(Systems)
- Gear Train
- Chain and Sprocket
- Friction Gears
- Belt and Pulley
- Wheel and Worm Wheel
Mechanical Engineering: Typical Functions & Mechanical Links
Types of Linking
- Direct or Indirect
- Rigid or Flexible
- Removable or Permanent
- Complete/Fixed or Partial/Removable
Mechanical Engineering: Typical Functions & Mechanical Links
Kinds of Linking
- Fixed
- Sliding
- Rotating
- Spherical
- Sliding Rotating
- Helical
Mechanical Engineering: Typical Functions & Mechanical Links
Define a fixed link:
No movement between parts.
Mechanical Engineering: Typical Functions & Mechanical Links
Define a sliding link:
One part translates (slides) into another.
Mechanical Engineering: Typical Functions & Mechanical Links
Define a rotating link:
One part rotates on an axis.
Mechanical Engineering: Typical Functions & Mechanical Links
Define a spherical link:
Rotates in all directions.
Mechanical Engineering: Typical Functions & Mechanical Links
Define a sliding rotating link:
Slides then rotates (seperate movements)
Mechanical Engineering: Typical Functions & Mechanical Links
Define a helical link:
Screws into/onto something.
Mechanical Engineering: Typical Functions & Mechanical Links
Types of guiding:
Rotational, Translational, Helical
Mechanical Engineering: Typical Functions & Mechanical Links
Definition of seal:
Prevents a gas or liquid from escaping.
Mechanical Engineering: Typical Functions & Mechanical Links
Definition of lubrication:
Reduces friction by technical means.
Mechanical Engineering: Typical Functions & Mechanical Links
Define a guide:
Forces a part to follow a certain guiding motion (translation/rotation)
Mechanical Engineering: Typical Functions & Mechanical Links
Define a link:
Links are used to connect 2 or more parts of an object.
Mechanical Engineering: Typical Functions & Mechanical Links
What are the 4 mechanical functions?
- Link
- Guide
- Lubrication
- Seal
Graphical Language: Orthogonal Projections
Define exploded view:
- Shows various parts of an object seperated from eachother.
Graphical Language: Orthogonal Projections
Define a multiview projection:
- 2-D representation of every view of an object, at least 3!
- Views: Usually front, right, top. Can also include left, bottom, and back.
- Mug-shot views
- Must be consistent and line up
Graphical Language: Orthogonal Projections
What is an isometric projection?
- A 3-D representation of an object placed so that 3 sides of the object are visible
- Visible views are generally front, side, top
- Visual lines in isometric projections are perpendicular to the paper.
Graphical Language: Orthogonal Projections
Name 3 types of projections:
- Isometric
- Multiview
- Exploded View
Earth & Space
Define a fossil:
Traces of an organism preserved mostly in sedimentary rock.
Earth & Space
Define a fossil:
Traces of an organism preserved mostly in sedimentary rock.
Earth & Space
The Cenozoic Era (Lasted 65 million years and is still happening)
- MAMMALS CONTINUE TO THRIVE
- Appearance of primates and HOMINIDS
Earth & Space
The Mesozoic Era (lasted 185 million years)
- Warm climate favored the appearance of large REPTILES.
- MASS EXTINCTION DUE TO A METEORITE IMPACT OR VOLCANIC ERUPTIONS CAUSED 50% OF MARINE LIFE TO DISAPPEAR
- MASS EXTINCTION DUE TO A METEORITE IMPACT IN YUCATA, MEXICO. THIS EVENT CAUSED THE DISAPPEARANCE OF THE DINOSAURS
Earth & Space
The Palaeozoic Era (lasted 300 million years)
- VERY COLD CLIMATE CAUSED A MASS EXTINCTION; HALF OF THE ANIMALS DISAPPEARED
- MAJOR EXTINCTION DUE TO VARIOUS EVENTS CAUSED 70% OF MARINE SPECIES TO DISAPPEAR (not amphibians—- marine life)
- LARGEST MASS EXTINCTION CAUSED BY GLACIATION, VOLCANIC ERUPTIONS (ACID RAIN AND GREENHOUSE EFFECT) AND DESTRUCTION OF OZONE LAYER; 96% OF MARINE SPECIES DISAPPEARED AND 75% OF LAND SPECIES DISAPPEARED
Earth and Space
The Precambrian Era: (lasted 4 billion years)
- During the 1000 million years, the solar system + Earth were formed
- Rodinia was the first continent to form
- Appearance of first life formes: PROKARYOTES (cells with no nuclei), and bacteria
- Appearance of bacteria that can do PHOTOSYNTHESIS and release oxygen into the atmosphere
- Appearance of EUKARYOTES (cells with nucleus); worms, soft coral, jellyfish
- Appearance of the EDIACARAN FAUNA; animals capable of digesting and reproduction
Earth & Space
Methods of dating fossils: Absolute dating
- Absolute dating is the process by which the age of the fossils or rock layers can be calculated using carbon dating.
- It is the most precise of the 3 methods of dating fossils.
- Absolute dating calculates the amount of carbon-14 or Uranium present in rocks to determine an approximate age.
- Carbon-14 decays at a predictable rate
Earth & Space
Methods of dating fossils: Relative dating
- Relative dating is based on superposition. It is used to determine the order in which events took place but not prove the exact age of the rock layer:
- WHEN A FAULT IS RUNNING THROUGH THEM!
Earth & Space
Methods of dating fossils: Superposition
- The principle of superposition states that the oldest layer is always found at the bottom and the youngest layer is always found at the top: this means that fossils found in lower layers comes from an era previous to the one above it.
- If rocks are UNDISTURBED
Earth & Space
What are layers or strata?
- Layers/strata are the sedimentary rock that are usually arranged in layers
- A stratigraphic layer is made of sedimentary deposits with the same characteristics (colour, particle size, type of rock).
- Stratigraphy is important because it allows science to explain the various events that happened in the Earths history.
Cell Division
Each —— produced during meiosis contains only ——– chromosome(s) of each —— so they can combine during fertilization to produce a ——— ——- of chromosomes
- daughter cell
- one
- pair
- complete
- Pair
Cell Division
Meiosis in males starts at —- in the ——- and continues until ——-.
- Puberty
- Testicles
- Death
Cell Division
Meiosis in females happens in the ——— (in the ———) and ——— (———-) are only mature enough to be fertilized starting at ————–
- Uterus
- in the womb
- egg cells
- ova
- puberty
Cell Division
What is meiosis?
Produces …. #
They are also called ________ what does this term refer to
Meiosis is a type of cell division that produces four different cells that are genetically different from the original mother cell. Reproductive cells are also called gametes; sperm cells (spermatozoa) and egg cells (ova) that unite during fertilization.
Cell Division
Function/Purpose of mitosis:
- Growth and repair of damaged tisses
- (Replacement of dead blood cells)
- (Repairement of cuts, fractures, muscel etc.)
Neurons are the only cells incapable of dividing or repairing themselves
Cell Division
In mitosis the daughter cells each contain ____ ____ chromosomes.
- 23
- Pairs of
Cell Division
Mitosis is a cell division that results in…. ___________ ___________ daughter cells
- Two
- Identical
Cell Division
What is mitosis?
Mitosis is a type of cell division used to make identical copies of cells.
Excretory System
Role of sweat glands in homeostasis:
Sweating that happens through either type of sweat gland serves a purpose. It maintains homeostasis, a stable equilibrium, of the skin and regulates body temperature. When our core temperature gets high enough through physical activity or high temperatures, sweating kicks off and cools you down while it evaporates.
Give you a higher concentration in terms of blood, releases water.
Excretory System
Role of lungs during homeostasis:
The role of the lungs in homeostasis is to maintain a balance of oxygen and carbon dioxide in the blood. When we breathe in, oxygen diffuses from the alveoli in the lungs to the blood. Carbon dioxide in the blood diffuses from the blood to the alveoli and we exhale.
Excretory System
Role of kidneys during homeostasis:
The kidneys regulate the fluid and electrolyte balance of the body by continually filtering the blood.
Excretory System
Explain how homeostasis works:
For example, when we drink a lot of liquids, there is too much water in the blood, making the volume of blood increase. The pituitary gland sends a message (less anti diuretic hormone) to the kidneys which will remove (or in other cases refrain from removing) water from the blood, resulting in a more diluted urine (less solute per volume of urine). Therefore, the concentration of mineral salts in the blood will return to normal level. If we eat too much salty food, the large intestine will absorb a lot of minerals, and the concentration of minerals in the blood will be too high. The pituitary gland sends a signal (more ADH) to the kidneys to hold on to water. Therefore, the kidneys remove less water and more mineral slats from the blood, resulting in a more concentrated urine (more solute per volume of urine).
Excretory System
What is homeostasis?
Homeostasis is the body’s ability to maintain balance (mineral salts in blood, blood pH, water, temperature, etc.).
Excretory System
All about the bladder:
The bladder is a stretchy bag made of muscles and it stores urine before it is expelled. A sphincter (circular muscle) located at the bottom of the bladder contracts to stop the flow of urine and relaxes to expel it.
Excretory System
Kidneys! How do they work?
The kidneys filter blood through millions of nephrons, which are small filtration units. The kidneys receive blood from the renal artery, which is connected through capillaries surrounding the nephrons. As blood circulates in the capillaries, the nephrons filter it by removing excess substances through the process of diffusion.
Excretory System
What is the function of the urinary system?
The main function of our urinary system is to filter blood to remove waste and excess substances such as water, minerals, and cellular waste. The urinary system also eliminates this waste, a process called urination.
Excretory System
What are the main parts of the urinary system?
- Kidneys
- Ureters
- Bladders
- Urethra
Lymphatic System
Explain the process of a vaccine:
- Identify invading pathogen, read antigen
- Duplicate white blood cell
- Produce antibodies against the invading pathogen
- Produce white blood cells to engulf pathogen
- Memorize/remember pathogen, and antibodies necessary
Lymphatic System
Explain the process of a vaccine:
- Identify invading pathogen, read antigen
- Duplicate white blood cell
- Produce antibodies against the invading pathogen
- Produce white blood cells to engulf pathogen
- Memorize/remember pathogen, and antibodies necessary
Lymphatic System
Explain the process of a vaccine:
- Identify invading pathogen, read antigen
- Duplicate white blood cell
- Produce antibodies against the invading pathogen
- Produce white blood cells to engulf pathogen
- Memorize/remember pathogen, and antibodies necessary
Lymphatic System
What is a genetically engineered vaccine?
- Modifies a pathogens genes
- Fights: Covid-19 vaccine, Hepatitis A&B
Lymphatic System
What is an inactivated vaccine?
- Dead pathogen
- Stimulate immune system
- Fights: Whooping cough, typhoid, etc.
Lymphatic System
What is an attenuated vaccine?
- Weakened
- Doesn’t cause the disease
- Recogmized by the body
- Fights MMR: Mumps, measles, rubella
Lymphatic System
3 kinds of vaccines:
- Attenuated vaccine
- Inactivated vaccine
- Genetic engineering
Lymphatic System
What are the 2 ways to produce anti-bodies?
- Vaccine
- Disease
Lymphatic System
What is a vaccine?
Weak or dead pathogens.
Lymphatic System
Uses of vaccines:
- Stimulate the immune system
- Make specific antibodies
- Prevent disease
