Question

what is the effect of exercise on respiration?

no effect on breathing rate but increased heart rate.

increased breathing rate to provide more oxygen to the body.

increased carbon dioxide intake due to exercise.

decreased breathing rate to conserve energy.

decreased oxygen intake due to exercise.

Explanation:

When exercising, the body's energy demand increases. Cellular respiration (which uses oxygen to produce energy) speeds up. To meet the higher oxygen need and remove more carbon dioxide (a by - product of cellular respiration), the breathing rate increases.

• The first option is wrong because exercise does affect the breathing rate.
• The third option is wrong as we inhale oxygen and exhale carbon dioxide.
• The fourth option is wrong because a decreased breathing rate would not meet the body's oxygen demand during exercise.
• The fifth option is wrong because oxygen intake increases during exercise.

Answer:

Increased breathing rate to provide more oxygen to the body.