Science Flashcards
Obtaining energy from food and reproduction
Organelle’s Task
Cells with the same function
Tissues
Carry out a single task
Organs
Responsible for oxygenating blood
Lungs
Filtering out wastes
Kidneys
Cell parts that function within a cell
Organelles
An organelle which carries out protein synthesis
Ribosome
Modified and packages protein secreted from a cell
Golgi apparatus
Converts energy present in chemical bonds of food accessible to cell
Mitochondria
Stores and processes instructions contained in DNA tells cell what it’s function is
Nucleus
Smallest living unit of life
Cells
Processes that include growth, metabolism, replication, protein synthesis, and movement
Cellular functions
Provide framework
Protects organs
Bone
Transport oxygen from atmosphere into cells and moving carbon dioxide in other directions
Respiratory system
Process of aerating lungs
Ventilation
Where air enters in the body?
Nasal openings, mouth
A large tube reinforced by cartilage rings which carry air to the bronchi
Trachea
Thin walled structures that look like clusters of grapes and are the sites of gas exchange
Alveoli
Serves as the medium for gas exchange and keep the lungs from collapsing on itself due to surface tension
Aqueous surfactant
Which side of the body is the heart on?
Left
Which lung is larger?
Right lung
The segments in the lungs
Lobes
How does gas exchange occur in the lungs?
By diffusion- a passive transport mechanism
Directly proportional to the surface area involved and the concentration gradient, and is inversely proportional to the distance between the two solutions
Rate of diffusion
Name the oxygen process
Oxygen [lungs] — blood— carbon dioxide[blood]— lungs— lungs exhale back into the atmosphere
What contract simultaneously to increase the volume of the lungs, decreasing pressure in the lungs? ( DRAWING IN AIR )
Diaphragm and intercostal muscles
Inhalation of air and expulsion of air
Inspiration and Expiration
The small amount of stale that remains trapped in alveoli after expiration and mixes with fresh air brought in through inspiration
Residual capacity
Controls breathing and respiration through monitoring carbon dioxide levels and blood pH
Medulla oblongata
Tiny air sacs in the lungs where exchange of oxygen and carbon dioxide take place
Alveoli
A lung disease characterized by inflamed narrowed airways and difficulty breathing
Asthma
The main passageways directly attached to the lungs
Bronchi
Small passages in the lungs that connect bronchi to alveoli
Bronchioles
Genetic disorder that affects the lungs and other organs characterized by difficulty breathing coughing up sputum and lung infections
Cystic fibrosis
The passage of fluid to an organ or a tissue
Perfusion
Membrane around the lungs and inside the chest cavity
Pleura
Fluid secreted by alveoli and found in the lungs
Surfactant
Amount of air breathed in a normal inhalation or exhalation
Tidal volume
Windpipe, which connects the larynx to the lungs
Trachea
Movement of air in and out of the body via inhalation and exhalation
Ventilation
Describes the movement of blood and lymph around the body which permits nutrient distribution, waste removal, communication, and protection
Circulatory system
Performs the vital functions of transporting nutrients, wastes, chemical messengers p, and immune molecules
Cardiovascular system
Double loop system consisting of arteries, veins, and capillaries that form a network that connect arteries to veins in tissues
Closed circulatory system
Circulates and filters interstitial fluid between cells and eventually drains into into the circulatory system
Open lymphatic system
Carries deoxygenated blood from the right ventricle to the lungs and returns oxygenated blood to the left atrium
Pulmonary loop
Carries oxygenated blood from the left ventricle to the body, returning deoxygenated blood to the right atrium
Systemic loop
Indicates contraction of heart muscles
Systole
Relaxation of heart muscle
Diastole
Heart cycle
The ventricles contract causing the atrioventricular valves to close making a “lub” sound. The empty ventricles are filled by blood pushed out during atrial systole. At the same time, the semilunar valves in the sorts and the pulmonary arteries close, preventing blood from falling back into the ventricles, making a “dub” sound and completing the “lub-dub” sound of the heart.
Causes the “lub-dub” contractions “pacemaker” that sends out electrical signals.
Sinoatrial node
Have thick walls to withstand the pressure of blood pumped by the heart
Arteries
Have thinner muscle layer and a large lumen
Veins
Contains nutrients, hormones, antibodies, and other immune proteins
Blood plasma
Contain hemoglobin and transport oxygen from the lungs to the rest of the body
RBC’s
WBC’s two main lineages
Leukocytes and lymphocytes
Essentially plasma with the RBC’s removed
lymph
Blood vessels that deliver blood from the heart to other parts of the body
Arteries
Small blood vessels that connect arterioles to venules
Capillary
Portion of the cardiac cycle in which the heart refills with blood
Diastole
Muscle that pumps blood throughout the body
Heart
Protein in red blood cells that carries oxygen from the lungs to the rest of the body
Hemoglobin
WBC’s which protect the body against disease
Leukocyte
Clear fluid that moves throughout the lymphatic system to fight disease
Lymph
Subtype of WBC’s found in lymph
Lymphocyte
Pale yellow component of blood that carries red blood cells, white blood cells, and platelets throughout the body
Plasma
Portion of the cardiac cycle in which the heart expels blood
Systole
Blood vessels that carry blood to the heart
Vein
Located in the abdominal cavity and is specialized for breaking down food for absorption and distribution to the rest of the body
Digestive system (gastrointestinal system)
Absorb the digested nutrients
Blood vessels
Under parasympathetic nervous system control
Smooth muscle
Where does the gastrointestinal system begin and end
Mouth-anus
Increases surface area by breaking it down into smaller pieces after food is ingested
Mechanical digestion by chewing and grinding
Lubricates the food
Mucus in saliva
Provides amylase and lipase to initiate chemical digestion of starch and lipids
Saliva
When food is packaged into a small parcel
Bolus
Technical term for swallowing
Deglutition
Closes the tracheal opening as the food passes from the pharynx into the esophagus
Epiglottis
Moves the bolus down to the stomach through the gastric sphincter, which prevents reflux of food back into the esophagus
Peristalsis
Initiates chemical digestion of proteins in the stomach
Pepsin
Name the three main secretions of the stomach
Pepsinogen (chief cells)
Mucus (goblet cells)
Hydrochloric acid ( parietal cells)
After digestion in the stomach, what is the food now called
Chyme
Where does the chyme pass through
The pyloric sphincter into the duodenum (first part of the small intestine)
Neutralizes the chyme in pancreatic secretions
Bicarbonate
What does the duodenum receive which helps neutralize acid chyme?
Alkaline bile from the gall bladder
What else does the duodenum produce?
Large number of “brush border” enzymes
Protease, lactase, and other disaccharidases and bicarbonate
What absorb polar digested nutrients into blood, lipids into lacteals as chylomicrons and vitamin B12
Villi and microvilli in the small intestine
Allows liver enzymes to deaminate amino acids?
Hepatic portal duct
Hepatic portal duct’s other functions
Converts ammonia to urea
Metabolize consumed toxins
Store glucose as glycogen
After the liver where does the digested material go after the liver?
Cecum-large intestine-colon
Where is the cecum located
Located at the junction of the small and large intestines
Absorbs a lot of water and nutrients
Small intestine
Absorbs remaining water and salt from digested food
Large intestine
What happens to the waste from the small intestine
It is exposed to bacterial fermentation in the colon
Where is Vitamin K absorbed ?
Large intestine
Whats the last step of the digestive system?
Waste accumulates in the rectum and is ejected through the anus
The organ that stores bile
Gall bladder
Also known as the Colin, where vitamins and water are absorbed before feces is stored prior to elimination
Large intestine
The organ that produces bile, regulates glycogen storage, and performs other bodily functions
Liver
Oral cavity at the entry to the alimentary canal
Mouth
Gland of the digestive and endocrine systems that produces insulin and secretes pancreatic juices
Pancreas
Series Of muscle contractions that move food through the digestive tract
Peristalsis
The last section of the large intestine, ending with the anus
Rectum
Clear liquid found in the mouth also known as spit
Saliva
Part of the GI tract between the stomach and large intestine that include the duodenum,jejunum, and ileum, where digestion and absorption of food occurs
Small intestine
Organ between the esophagus and small intestine in which the major portion of digestion occurs
Stomach
Name the enzymes and major hormones associated with each of the following:
Mouth Stomach Liver Pancreas Small intestine Large intestine
Mouth- salivary amylase, lipase/NO
Stomach-gastric lipase,pepsin,HCL/ gastrin, ghlerin
Liver- bile/NO
Pancreas-pancreatic juice/ secretin,somatostatin,insulin, glucagon
Small intestine - proteases, lactase, disaccharidases/ cholecystokinin,somatostatin, secretin, motilin
Large intestine -NO/NO
Carbohydrate-digesting enzyme produced by salivary glands
Salivary amylase
Zymogen form of protease produced by the stomach
Pepsinogen
Cells that produce acid in the stomach
Parietal cells
Valve through which chyme passes from stomach to duodenum
Pyloric sphincter
Hormone produced by stomach that induces stomach secretions
Gastrin
Hormone that induces bile and pancreatic juice secretion
Cholecystokinin
Second section of small intestine where majority of absorption occurs
Jejunum
Blood vessels that carries nutrients directly from small intestine to liver
Hepatic portal vein
Substance mainly absorbed from waste in large intestine
Water
Region of large intestine in which feces is stored before elimination
Rectum
Why is liver failure a critical health emergency
Because the liver filters digestion products and produces urea as waste
Which type of molecules make up the cytoskeleton?
Microtubules,microfilaments, intermediate filaments
What are the functions of the cytoskeleton molecules?
Cell shape, support, and movement
Responsible for receiving, modifying and transporting proteins for secretions from the cell
Golgi apparatus
Lacks ribosomes for proteins synthesis
Smooth ER
Smooth ERs functions
Lipid metabolism, storage of calcium ions, and detoxification of toxins
Forms the dynamic outer perimeter of cells, delineating the inside and outside of the cell
Cell membrane
Cell membranes functions
Cellular recognition and molecule transportation
Mouth below the nose
Inferior
Patella to the tibia
Superior
Skin to muscles
Superficial
Site of synthesis of RBCs in the adult
Bone marrow
Involved in the breakdown of RBCs
Liver and spleen
Filters for the lymphatic system and are not involved in RBC production
Lymph nodes
Senses the pH when carbon dioxide is dissolved in blood to produce H+ and HCO3- ions, decreasing pH and increasing acidity
Medulla oblongata
What happens when you reduce the residual volume of the lungs?
A higher inspiratory volume and oxygen gradient
Walking pneumonia
Mycoplasma infection
Bacteria lacking cell walls
Infect upper and lower respiratory tract cells and replicate within themselves
Mycoplasma
Usually caused by an inherited gene mutation in the chloride transporter in the lung; thick mucus accumulates in the lung, causing problems with ventilation and promotions secondary infections
Cystic fibrosis
Caused by one of several kinds of RNA containing viruses in the corona virus groups; only disease caused by a virus in the list above.
Influenza
Causes tuberculosis which causes lesions in lung tissue =. Bacteria wall themselves inside cavities inside the lung to protect from immune attack.
mycobacterium tuberculosis
A fungal disease. The prefix myco- is used in relation to fungus and is applicable to a variety of types of fungi infecting a variety of tissue including lungs
Mycosis
Generate electricity in the sinoatrial node and conduct the impulse through the heart to cause muscle contraction
Cardiac cells
Contract to pump blood around the body
Cardiac cells
Increase the body’s recognition of the vaccine antigen, and antibodies should rise following immunization
Vaccines
The ‘pacemaker’ situated in the top part of the right atrium
Sinoatrial node
Carries oxygenated blood from the lungs to the heart
Pulmonary vein
Action that causes food to move into the digestive system and this increases after food enters the digestive system compared to when there is no food in the digestive system
Peristalsis
Usually due to activation of the sympathetic circuit
Pulse rate
Controls the digestive system
Parasympathetic circuit
Required for digestion of food
Enzymes
Converts ammonia to urea
Liver
Integrates muscles and nerves; affects every part of the body and is vital in controlling involuntary and voluntary movement.
Neuromuscular system
Long bundles of axons that transmit signals from the CNS
Nerves
Send and receive signals in the neuromuscular system
Nerves
Send messages to the central nervous system
Sensory (afferent)
Send messages out to the muscles
Motor (efferent)
Controls involuntary actions involving cardiac and smooth muscle, such as heart rhythm, digestion, and breathing
Autonomic (involuntary)
Make skeletal muscles do a deliberate action such as walking, throwing, or typing
Voluntary nerve signals
Contain long myofibrils made of sarcomere units
Muscles
Thin filaments
Actin
Thick filaments
Myosin
How do skeletal muscles work?
The nervous system sends a signal to a muscle, actin and myosin proteins in the muscle slide past each other, creating either a contraction or a relaxation of the muscle
What allows muscles to receive a signal and respond with the appropriate magnitude and movement.
Receptors
A nerve fiber that carries a nerve impulse away from the neuron cell body
Axon
Fibrous tissue that produces force and motion to move the body or produce movement in parts of the body
Muscle
A bundle of nerve fibers that transmits electrical impulses toward and away from the brain and spinal cord
Nerve
Release of tension in a muscle
Relaxation
The structure that allows neurons to pass signals to other neurons, muscles, or glands
Synapse
How signals move through nerve cells
Electrical
Type of energy not associated with the synapse
Kinetic and potential
Responsible for storing energy and protecting nerve cells
Fat
Serve as an energy source
Carbohydrates
Make up DNA
Nucleic acid
Generates male gametes (sperm)
Male reproductive system
Name the major components of the male reproductive system
Penis, vas deferens, urethra, prostate, seminal vesicles, testis and scrotum
Houses the testes away from the body to lower their temperature during sperm reproduction
Scrotum
Produce the fluids necessary for lubricating and nourishing the sperm
Prostate and seminal vesicles
Form the conduit through which sperm is ejected
Vas deferens
The passage that forms the lower part of the uterus
Cervix
Female sex hormones
Estrogen
Tubes that carry eggs from the ovaries to the uterus
Fallopian tubes
Organ in which eggs are produced for reproduction
Ovary
Organ for elimination of urine and sperm from the male body
Penis
The gland in males that controls the release of urine and secretes a part of semen that enhances motility and fertility of sperm
Prostate
The pouch of skin that contains the testicles
Scrotum
The organs that produce sperm; also called testes
Testicles
The hormone that stimulates male secondary sexual characteristics
Testosterone
The tube that connects the bladder to the exterior of the body
Urethra
The womb
Uterus
The tube that connects the external genitals to the cervix
Vagina
The duct in which sperm moves from a testicle to the urethra
Vas deferens
Generates female gametes (eggs) and incubates the fetus during pregnancy
Female reproductive system
The female reproductive system parts
Ovaries, Fallopian tubes, uterus, cervix
Opening to the uterus
Cervix
What matures and releases an egg that then travels down the Fallopian tubes to the uterus
Graafian follicle
What normally occurs in the Fallopian tubes
Fertilization
What happens after the Fallopian tubes?
The fertilized egg embeds itself in the uterine wall and produces placenta that allows the fetus and parent blood supplies to network.
Nourishes the fetus and removes wastes
Placenta
Part of the endocrine system and allow for cell-to-cell communication
Hormones
What is produced from the ovaries?
Estrogen
What causes the egg to mature in the ovary’s Graafian follicle and the uterine endometrium to thicken
Estrogen
Causes the developing egg to be release?
A surge of LH
After the egg is released what is the empty Graafian follicle called?
Corpus luteum
What does the corpus luteum release?
Large amounts of progesterone to prepare the endometrium for implantation of the fertilized egg
What happens if implantation does not occur?
The uterine lining sheds
Cycle of maturation and shedding of endometrium
Menstrual cycle
Because testosterone production is not cyclical what happens to the sperm?
Sperm are constantly produced and matured
Help control secondary sexual characteristics, such as production of mammary glands, axial and facial hair, fat deposition patterns, and muscle growth
Male and female hormones
Responsible for delivering sperm
Penis
Responsible for creating fluid to transfer the sperm
Prostate