Inhalation brings in fresh _______________ and exhalation removes _______________
a. carbon dioxide; oxygen
b. oxygen; nitrogen
c. oxygen; carbon dioxide
d. nitrogen; carbon dioxide
c
Explanation:
a. carbon dioxide; oxygen: should be the other way around
b. oxygen; nitrogen: nitrogen is not removed during exhalation
c. oxygen; carbon dioxide: correct
d. nitrogen; carbon dioxide: nitrogen is not brought in during inhalation
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