Travis is taking a long run, and his muscle tissue needs more oxygen. He is breathing heavily and taking in a lot of oxygen. How
does this exercise affect circulation?

A. Travis's heart pumps more quickly to allow oxygen to be removed from the air and transported to the tissue.

B. Travis's heart pumps more slowly to give the blood cells time to pick up the oxygen and drop it off at the tissues.

C. Travis's coronary arteries become blocked, so blood travels to other muscles, where it is necessary.

D. Travis's heart starts angiogenesis so that he has more vessels to transport blood to the tissues.

The exercise Travis is doing affects his circulation because Travis's heart pumps more quickly to allow oxygen to be removed from the air and transported to the tissue.

Explanation:

Physical exercise implies an increase in the muscular demand of oxygen -in addition to glucose- to be able to synthesize enough energy to carry out the effort.

During exercise, Travis increased his breathing rate in order to acquire more oxygen from the air, but his circulation was also affected.

An increase in heart rate -heart pumps more quickly- occurs during exercise, in order to take oxygen from the lungs and carry it through the blood to the tissues that need it most, such as the muscles.