Question

what is the effect of exercise on respiration?
increased breathing rate to provide more oxygen to the body.
decreased oxygen intake due to exercise.
no effect on breathing rate but increased heart rate.
increased carbon dioxide intake due to exercise.
decreased breathing rate to conserve energy.

Explanation:

During exercise, the body's cells need more energy. Cellular respiration requires oxygen. To meet the increased oxygen demand, the breathing rate increases. This allows more oxygen to be taken in and more carbon dioxide (a waste product of respiration) to be expelled. Options like decreased oxygen intake (cells need more oxygen during exercise), no effect on breathing rate (breathing rate does change), increased carbon dioxide intake (body expels, not takes in, more CO₂ during exercise), and decreased breathing rate (opposite of what happens) are incorrect.

Answer:

Increased breathing rate to provide more oxygen to the body.