At High Workloads,increasing Cardiac Output is Achieved By

Question

At high workloads,increasing cardiac output is achieved by:
A) Increasing stroke volume
B) Increasing vascular resistance
C) Increasing heart rate
D) Decreasing the VD/VTratio

Accepted Answer

Increasing heart rate increases cardiac output by increasing the number of contractions per minute, which allows more blood to be pumped out of the heart.