Question

human respiratory system quiz
during the exchange of air in your lungs, oxygen is being taken into your bloodstream while this substance is being released.
(1 point)
○ microorganisms
○ carbon dioxide
○ plasma
○ mucus

Explanation:

In pulmonary gas exchange, oxygen diffuses from the lungs into the bloodstream to be used by body cells. As a waste product of cellular respiration, carbon dioxide moves from the bloodstream into the lungs to be exhaled. The other options do not fit: microorganisms are foreign particles, plasma is blood fluid, and mucus is a protective lung secretion.

Answer:

carbon dioxide