Question

A person sprints across a football field to make the touchdown. The person’s muscles use up most of the oxygen in the blood to accomplish this. Which response do you predict would happen because of this?(1 point)
Responses

The pulse and breathing rate increases to provide more oxygen.
The pulse and breathing rate increases to provide more oxygen.

The muscles begin to use carbon dioxide to power contractions.
The muscles begin to use carbon dioxide to power contractions.

The blood pressure drops because of a drop in blood volume.
The blood pressure drops because of a drop in blood volume.

The heart rate decreases to give more time for oxygen to enter.

Answer 1

The most likely response to the person sprinting across the football field, resulting in their muscles using up most of the oxygen in the blood, would be:

**The pulse and breathing rate increases to provide more oxygen.**

This response is necessary to meet the increased demand for oxygen by the muscles during intense physical activity.