Kristen is running a half marathon. By her tenth minute of running, her breathing rate has increased from her resting rate. Which statement best describes how her tissues are responding to her running?

A. They need more oxygen to function, so gas exchange needs to decrease.

B. They need more oxygen to function, so gas exchange needs to increase.

C. They need more carbon dioxide to function, so gas exchange needs to increase. D. They need more carbon dioxide to function, so gas exchange needs to decrease.

Question

Biology

Caitlin Gamble

2 May, 17:12

Kristen is running a half marathon. By her tenth minute of running, her breathing rate has increased from her resting rate. Which statement best describes how her tissues are responding to her running?

A. They need more oxygen to function, so gas exchange needs to decrease.

B. They need more oxygen to function, so gas exchange needs to increase.

C. They need more carbon dioxide to function, so gas exchange needs to increase. D. They need more carbon dioxide to function, so gas exchange needs to decrease.

+5

Answers (1)

Know the Answer?

Emilia Wood · Answer 1

B. They need more oxygen to function, so gas exchange needs to increase.

Explanation:

The RIGHT option is B.

They need more oxygen to function, so gas exchange needs to increase.

As Kristen began the physical exercise, the workload of her muscles became higher, which yielded a greater need of ATP. So as to yield ATP, the mitochondria needs higher amount of oxygen and glucose to produce the ATP molecules, which will in turn raises the need for oxygen. The aftermath of the need for higher oxygen results in the lungs undergoing more gaseous exchange, in order to meet this high oxygen need.