BIO 2301 HUMAN PHYSIOLOGY - EXAM 3 QUESTIONS AND
ANSWERS DOWNLOADED 2024/2025 A COMPLETE SOLUTION
WITH CORRECT VERIFIED ANSWERS RATED TO SCORE A+ FOR
PASS
Plaminogen is ___________ into the clot when the clot is made and the clot has a _________
way of getting rid of itself - CORRECT ANSWERS - incorpoated
- built in
Why don't you want the clot around after you do not need it anymore? - CORRECT
ANSWERS - A piece of the clot can break off and start traveling in the blood stream,
becoming an embolus
- These emboli can get stuck in small blood vessels, causing strokes, heart attacks, and
pulmonary emboli
What happens with over-aggressive clot formation? - CORRECT ANSWERS - Can cause
strokes, heart attacks and pulmonary emboli
What else causes unwanted clot formation? - CORRECT ANSWERS - Rough tissue
inside the blood vessels
- The rough lining of the blood vessel with stimulate platelet plug formation and then clots will
form
- Example: Atherosclerosis which causes cholesterol deposits in the arteries
- Blood pooling: the pooling of blood will activate clotting factors
How does aspirin prevent clot formation? - CORRECT ANSWERS Inhibits thromboxane
A2 therefore inhibiting the formation of the platelet plug
What substances does the body have that limit clot growth? - CORRECT ANSWERS -
Antithrombin III: present in the plasma, binds thrombin and inactivates it so thrombin cannot
form clots elsewhere
- Herapin-Like Molecules on endothelial cells: increase the activity of antithrombin III
,BIO 2301 HUMAN PHYSIOLOGY - EXAM 3 QUESTIONS AND
ANSWERS DOWNLOADED 2024/2025 A COMPLETE SOLUTION
WITH CORRECT VERIFIED ANSWERS RATED TO SCORE A+ FOR
PASS
Boyle's Law - CORRECT ANSWERS - States that pressure of a gas varies inversely with
volume
- If volume goes up, pressure goes down
- It volume goes down, pressure goes up
Relevant pressures - CORRECT ANSWERS - Atmospheric: 760mmHg at sea level
- Intrapulmonic: pressure in the alveoli and it changes with the phases of breathing but it
always eventually equalizes with atmospheric pressure
- Intrapleural: pressure within the pleural cavity, it changes with the phases of breaking but is
always less than intrapulmonic pressure
Muscles of inspiration - CORRECT ANSWERS - Resting inspiration: diaphragm and
external intercostals
- Deep inspiration: neck and back muscles
Volume and pressure changes during inspiration - CORRECT ANSWERS Volume goes
up, pressure goes down and air goes in
Muscles of expiration - CORRECT ANSWERS - Resting expiration: no muscles needed -
the external intercostals and diaphragm relax, causing decrease volume -> elastic recoil of the
lungs increases pressure in lungs -> air goes out
- Forced expiration: abdominal muscles - these increase pressure in the abdomen which
increases pressure in the chest and forces air out
Compliance - CORRECT ANSWERS The ability to expand the lungs for inspiration
, BIO 2301 HUMAN PHYSIOLOGY - EXAM 3 QUESTIONS AND
ANSWERS DOWNLOADED 2024/2025 A COMPLETE SOLUTION
WITH CORRECT VERIFIED ANSWERS RATED TO SCORE A+ FOR
PASS
Consequences of decreased compliance - CORRECT ANSWERS Decreased ability to
inhale
Restricted airway diseases - CORRECT ANSWERS - Cause decreased vital capacity and
restrict the ability to expand the lungs, causing decreased compliance
- Examples: fibrosis (scar tissue in lungs), silicosis (talc or other substances in the lungs)
Other causes of decreased compliance - CORRECT ANSWERS Anything that decreases
the flexibility of the thoracic cage like a chest wrap that is too tight or something heavy on
someone's cgest
What is the significance of surface tension in compliance? - CORRECT ANSWERS - The
tension at the air-water interface within the alveoli
- If the surface tension is not lowered, the work to breath would be too great - too hard to
expand the alveoli - and you would not be able to breath in
What chemical is produced by the cells of the alveoil and what does it do? - CORRECT
ANSWERS - Surfactant is the chemical produced
- It decreases surface tension and therefore decreases the energy needed to expand the lungs
Do premature babies have surfactant? - CORRECT ANSWERS No so they cannot
breathe on their own
Airway resistance - CORRECT ANSWERS Especially to air flowing out of the lungs
ANSWERS DOWNLOADED 2024/2025 A COMPLETE SOLUTION
WITH CORRECT VERIFIED ANSWERS RATED TO SCORE A+ FOR
PASS
Plaminogen is ___________ into the clot when the clot is made and the clot has a _________
way of getting rid of itself - CORRECT ANSWERS - incorpoated
- built in
Why don't you want the clot around after you do not need it anymore? - CORRECT
ANSWERS - A piece of the clot can break off and start traveling in the blood stream,
becoming an embolus
- These emboli can get stuck in small blood vessels, causing strokes, heart attacks, and
pulmonary emboli
What happens with over-aggressive clot formation? - CORRECT ANSWERS - Can cause
strokes, heart attacks and pulmonary emboli
What else causes unwanted clot formation? - CORRECT ANSWERS - Rough tissue
inside the blood vessels
- The rough lining of the blood vessel with stimulate platelet plug formation and then clots will
form
- Example: Atherosclerosis which causes cholesterol deposits in the arteries
- Blood pooling: the pooling of blood will activate clotting factors
How does aspirin prevent clot formation? - CORRECT ANSWERS Inhibits thromboxane
A2 therefore inhibiting the formation of the platelet plug
What substances does the body have that limit clot growth? - CORRECT ANSWERS -
Antithrombin III: present in the plasma, binds thrombin and inactivates it so thrombin cannot
form clots elsewhere
- Herapin-Like Molecules on endothelial cells: increase the activity of antithrombin III
,BIO 2301 HUMAN PHYSIOLOGY - EXAM 3 QUESTIONS AND
ANSWERS DOWNLOADED 2024/2025 A COMPLETE SOLUTION
WITH CORRECT VERIFIED ANSWERS RATED TO SCORE A+ FOR
PASS
Boyle's Law - CORRECT ANSWERS - States that pressure of a gas varies inversely with
volume
- If volume goes up, pressure goes down
- It volume goes down, pressure goes up
Relevant pressures - CORRECT ANSWERS - Atmospheric: 760mmHg at sea level
- Intrapulmonic: pressure in the alveoli and it changes with the phases of breathing but it
always eventually equalizes with atmospheric pressure
- Intrapleural: pressure within the pleural cavity, it changes with the phases of breaking but is
always less than intrapulmonic pressure
Muscles of inspiration - CORRECT ANSWERS - Resting inspiration: diaphragm and
external intercostals
- Deep inspiration: neck and back muscles
Volume and pressure changes during inspiration - CORRECT ANSWERS Volume goes
up, pressure goes down and air goes in
Muscles of expiration - CORRECT ANSWERS - Resting expiration: no muscles needed -
the external intercostals and diaphragm relax, causing decrease volume -> elastic recoil of the
lungs increases pressure in lungs -> air goes out
- Forced expiration: abdominal muscles - these increase pressure in the abdomen which
increases pressure in the chest and forces air out
Compliance - CORRECT ANSWERS The ability to expand the lungs for inspiration
, BIO 2301 HUMAN PHYSIOLOGY - EXAM 3 QUESTIONS AND
ANSWERS DOWNLOADED 2024/2025 A COMPLETE SOLUTION
WITH CORRECT VERIFIED ANSWERS RATED TO SCORE A+ FOR
PASS
Consequences of decreased compliance - CORRECT ANSWERS Decreased ability to
inhale
Restricted airway diseases - CORRECT ANSWERS - Cause decreased vital capacity and
restrict the ability to expand the lungs, causing decreased compliance
- Examples: fibrosis (scar tissue in lungs), silicosis (talc or other substances in the lungs)
Other causes of decreased compliance - CORRECT ANSWERS Anything that decreases
the flexibility of the thoracic cage like a chest wrap that is too tight or something heavy on
someone's cgest
What is the significance of surface tension in compliance? - CORRECT ANSWERS - The
tension at the air-water interface within the alveoli
- If the surface tension is not lowered, the work to breath would be too great - too hard to
expand the alveoli - and you would not be able to breath in
What chemical is produced by the cells of the alveoil and what does it do? - CORRECT
ANSWERS - Surfactant is the chemical produced
- It decreases surface tension and therefore decreases the energy needed to expand the lungs
Do premature babies have surfactant? - CORRECT ANSWERS No so they cannot
breathe on their own
Airway resistance - CORRECT ANSWERS Especially to air flowing out of the lungs
