Question 4

(Multiple Choice)

Which of these statements does NOT refer to alveoli


A)They are the sites of gas exchange in the lungs.
B)They are very thin and surrounded by a network of capillaries so that air and blood are separated by a very thin barrier.
C)Type II cells secrete pulmonary surfactant.
D)Their interdependence refers to air flow between adjacent alveoli through the pores of Kohn.

Answer