Question

A scientist is investigating the rate of cellular respiration when a person is exercising and when at rest. How would the amount of gas released be different in these two situations?

A) Less oxygen would be released when exercising than when at rest.

B) More oxygen would be released when exercising than when at rest

C) Less carbon dioxide would be released when exercising than when at rest

D) More carbon dioxide would be released when exercising than when at rest.

Answer 1

During exercise, your body needs more energy, which means your tissues consume more oxygen than they do at rest. Consuming more oxygen means you will also produce more carbon dioxide because your metabolic rate is elevated.