Where and how does gas exchange occur between the outside air and the bloodstream?
a. capillaries and diffusion
b. alveoli and diffusion
c. capillaries and osmosis
d. alveoli and active transport
e. alveoli and osmosis
Answer: B
Where and how does gas exchange occur between the outside air and the bloodstream?
a. capillaries and diffusion
b. alveoli and diffusion
c. capillaries and osmosis
d. alveoli and active transport
e. alveoli and osmosis