week 1 Flashcards

1
Q

levels of human structure

A

atoms, molecules, macromolecules, organelle, cell, tissue, organ, organ systems, organism

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2
Q

endocrine system

A

function: regulation of body processes through hormone production
organs: adrenal glands, pituitary glans, pancreas

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3
Q

nervous system

A

function: processing centre for sensory input, using the input to elicit appropriate responses
organs: brain, spinal cord, nerves

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4
Q

respiratory system

A

function: gas exchange between the internal and external environment
organs: lungs, nose, mouth, windpipe

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5
Q

cardiovascular system

A

function: circulation of blood which transports gases, nutrients, hormones and waste
organs: heart, veins, arteries, capillaries

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6
Q

digestive system

A

function: physical and chemical breakdown of food to allow absorption of nutrients
organs: intestines, stomach, rectum, mouth

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7
Q

lymphatic system

A

function: circulation of lymph which maintains fluid balance and helps fight infection
organs: lymph nodes, spleen, thymus

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8
Q

reproductive system

A

function: production of reproductive cells that will generate offspring
organs: ovaries, uterus, cervix, vagina

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9
Q

urinary system

A

function: filtration of blood and excretion of wastes from the body
organs: kidneys, uterus, bladder

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10
Q

integumentary system

A

function: protection against the external environment and regulation of temperature
organs: skin, nails, hair associated glands

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11
Q

skeletal system

A

function: support and protection of many internal organs
organs: bones, cartilage, ligaments, tendons

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12
Q

muscular system

A

function: voluntary and involuntary movement
organs: muscles, soft tissue, tendons

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13
Q

intercellular fluid

A

fluid inside cells (40% body weight)

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14
Q

extracellular fluid

A

fluid outside cells (20% body weight)

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15
Q

interstitial fluid

A

fluid between cells

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16
Q

plasma

A

fluid component of blood

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17
Q

atoms

A

smallest units of an element

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18
Q

molecule

A

2 or more atoms bonded together

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19
Q

synthesis/anabolic reaction

A

small molecules/atoms built to larger molecules (amino acids-proteins)

20
Q

decomposition/catabolic reaction

A

large molecules broken down into smaller molecules/atoms (glycogen-glucose molecules)

21
Q

displacement

A

chemical bonds are both made and broken

22
Q

enzyme

A

catalyst that increases the rate of a reaction

23
Q

organic molecules

A
  • contain BOTH carbon and oxygen
  • more complex
  • typically insoluble in water
24
Q

inorganic molecules

A
  • do not contain BOTH carbon and oxygen
  • simpler molecules
  • ionic molecules
25
Q

electrolytes

A

substances that release ions in water

26
Q

acids

A

release H+ ions

27
Q

bases

A

releases ions that can bind H+ ions

28
Q

salts

A

releases ions that do not affect pH

29
Q

pH

A

a measure of how acidic or basic a solution is

30
Q

basic/alkaline 7+

A

LESS hydrogen ions - HIGHER pH

31
Q

Acidic -7

A

MORE hydrogen ions - LOWER pH

32
Q

macromolecules

A

repeating units of monomers (polymers)

33
Q

carbohydrates

A

building blocks: simple sugars
biological function: provide energy for cells to function

34
Q

lipids

A

building blocks: fatty acids and glycerol
biological function:
- triglyceride: LTE storage of lipids
- phospholipids: cell membrane
- steroids: cholesterol

35
Q

nucleic acids

A

building blocks: nucleotides
biological function:
- DNA: hereditary information - encodes genes
- ATP: energy storage - cellular energy

36
Q

proteins

A

building blocks: amino acids
biological function: structure of proteins determines their function

37
Q

fibrous proteins

A

elongated - stable
structural proteins= keratin, collagen

38
Q

globular proteins

A

compact - chemically active
functional proteins= enzymes, hormones

39
Q

homeostasis

A

maintenance of a relatively stable conditions in the internal environment

40
Q

homeostatic control mechanism

A

stimulus, receptor, afferent pathway, control centre, efferent pathway (nervous, hormonal), effector, response

41
Q

negative feedback system

A

response negates the stimulus - stimulus returns back to normal range and response stops (sweating)

42
Q

positive feedback system

A

response amplifies the stimulus to keep a variable outside of normal range until a process is complete (childbirth)

43
Q

components of blood

A

plasma, buffy coat, haematocrit

44
Q

haematocrit

A

% of our blood volume that is comprised of red blood cells

45
Q

erythrocytes

A
  • red blood cells
  • biconcave shape allows the cell to be stackable, flexible and it has no organelles
  • facilitate function of gas transport
46
Q

functions of the blood

A
  • distribution of oxygen, CO2, hormones, nutrients and waste
  • regulation of interstitial fluid, pH and body temperature
  • protection through leukocytes (infection control) and platelets (blood clotting)
47
Q

how blood maintains homeostasis

A

regulation of the internal environment ensuring protein structure is maintained and cells can function correctly