External respiration involves the
A) exchange of dissolved gases between the blood and the interstitial fluid.
B) utilization of oxygen by tissues to support metabolism.
C) diffusion of gases between the alveoli and the circulating blood.
D) movement of air into and out of the lungs.
E) binding of oxygen by hemoglobin.

Question

Quizplus · Accepted Answer

External respiration refers to the exchange of gases between the alveoli in the lungs and the blood in the pulmonary capillaries, primarily involving the diffusion of oxygen into the blood and carbon dioxide out of the blood.

External Respiration Involves the