HK 368 Homework 3

How does the cardiovascular system maintain exercise intensity with the drop in central blood volume associated with a hot compared to moderate temperature environment?

Increasing stroke volume

Which adaptation aids the trained athlete in reaching a higher preload in the left ventricle and, thus enhanced exercise performance?

Cardiac (heart) hypertrophy

Greater sweat volume will always result in greater body cooling?

False

Increasing aortic pressure without a change in peripheral resistance or venous pressure would result greater blood flow?

False

The a-vO2 difference increase as exercise intensity increases due to:

Greater extraction of oxygen from arterial blood

An increase in SNS stimulation to the heart would increase:

heart rate and contractility