Compared to exercise at sea level,exercise at high altitude (at the same exercise intensity)results in
A)a higher heart rate.
B)a decrease in ventilation.
C)an increase in heat production.
D)all of the above answers are correct.

Question

Quizplus · Accepted Answer

At high altitude, there is reduced oxygen availability, which triggers an increase in heart rate in order to compensate for the decreased oxygen delivery to the tissues. Ventilation actually increases at high altitude to facilitate gas exchange and maintain oxygen delivery, so choice B is incorrect. Heat production may increase due to the increased metabolic demand of exercising at high altitude, but this is not a consistent or significant enough effect to choose choice C. Therefore, only choice A is correct.

Compared to Exercise at Sea Level,exercise at High Altitude (At