How is the heart able to adapt to increased demands during exercise?
A) It decreases the volume of blood being pumped out with each beat.
B) The heart's rate will plateau at a given level within 15-20 minutes.
C) With high-intensity demands, heart rate and oxygen consumption are inversely related.
D) Cardiac output increases as aerobic capacity increases.
E) The stroke volume will increase as the heart rate increases at a given exercise load.

Question

Quizplus · Accepted Answer

During exercise, the heart adapts to increased demands by increasing cardiac output, which is the product of heart rate and stroke volume. As aerobic capacity increases, the heart becomes more efficient at pumping blood, thus increasing cardiac output.

How Is the Heart Able to Adapt to Increased Demands