Question

question 18
1 pts
______ is the process of expelling carbon dioxide from the lungs and taking oxygen into the lungs.

inhalation

cellular respiration

exhalation

breathing

Explanation:

• Inhalation is just taking in oxygen.
• Exhalation is just expelling carbon dioxide.
• Cellular respiration is a process in cells, not directly about lung gas exchange.
• Breathing includes both inhaling (taking oxygen) and exhaling (expelling carbon dioxide) in the lungs.

Answer:

D. Breathing