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BIO 270 HYND EXAM 3 WITH SOLUTIONS
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BIO 270 HYND EXAM 3 WITH SOLUTIONS
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BIO 270 HYND EXAM 3 WITH SOLUTIONSYou just got done exercising. How do you expect our curve to shift? Correct Ans-To right to
unload O2
Which of following is true regarding Co2
a. It can bind with hemoglobin
b. it can be found dissolved in our blood
c. 20x more soluble than O2
d. All of above Correct Ans-d. All of above
Is the pressure for Co2 higher in our lungs or air? Correct Ans-Co2 pressure is higher in
lungs so we can breathe out co2
What are the functions of surfactant? Correct Ans-Decrease hydrogen binding in water
molecules
Increase compliance
Allows lungs to come back slowly
(recoil is lungs coming back, when lungs are at low volume water attracts each other, makes it
hard to inflate then, surfactant will reduce binding of water)
, BIO 270 HYND EXAM 3 WITH SOLUTIONS
Recoil depends on 2 factors: Correct Ans-1) Highly elastic connective tissue in lungs
2) Alveolar surface tension (H mol. like to be close)
Treatment of Asthma
Albuterol: mimics sympathetic signal
Anti-Cholinergics: block parasympathetic signals Correct Ans-
Muscle activity during ACTIVE expiration Correct Ans-Contraction of internal intercostals
Contraction of abdominals
-flattened ribs and sternum
Muscle activity during inspiration Correct Ans-Contraction of external intercostals
Contraction of diaphragm
Boyle's Law: Correct Ans-pressure exerted by a gas is inversely proportional with the
volume of the container
How is surfactant made? Correct Ans-secreted by type 2 alveolar cells
What activates plasminogen to plasmin? Correct Ans-TPA
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