The volume of blood ejected with each heartbeat, depends on:
A) the preload and afterload factors.
B) influence of the autonomic nervous system (ANS).
C) ventricular filling with audible vibrations.
D) rhythmic expansion of arterial walls.

Question

Quizplus · Accepted Answer

The volume of blood ejected with each heartbeat depends on the preload and afterload factors. Preload refers to the amount of blood in the ventricle before it contracts, while afterload refers to the resistance against which the ventricle must contract to eject blood.

The Volume of Blood Ejected with Each Heartbeat, Depends On