To increase the output of the heart, what adjustments are made in the circulatory system?
1) an increase in heart rate
2) an increase in stroke volume of the heart
3) a reduced blood flow to the brain
A) only 1
B) only 2
C) only 3
D) 1 and 2
E) 1, 2, and 3

Question

Quizplus · Accepted Answer

To increase the output of the heart, both an increase in heart rate and an increase in stroke volume of the heart are needed. However, reducing blood flow to the brain would be counterproductive and potentially dangerous, so option 3 is not a viable adjustment.

To Increase the Output of the Heart, What Adjustments Are