Question 1
What is the molecule that prevents lung collapse by lowering the surface tension of the water
film lining each alveolar sac?
Select one:
a. resorbin
b. renin
c. lecithin
d. surfactant
e. fibrosin
Question 2
What is the respiratory rate in adults?
Select one:
a. 5-10 respirations per minute
b. 12-18 respirations per minute
c. 20-25 respirations per minute
d. 30 respirations per minute
e. over 40 respirations per minute
Question 3
Of the following choices, which one of the following is NOT a function of the paranasal
sinuses?
Select one:
a. they lighten the skull
b. they act as resonance chambers for speech