Question

(02.01 lc)
stroke volume is best defined as
o a measurement of the sound of your heartbeat
o a measurement of how hard your heart beats at rest
o the amount of blood your heart pumps to maintain what your body needs
o the amount of blood your heart pumps out each time it beats

Explanation:

Stroke volume is defined as the amount of blood pumped per heart beat. The other options are incorrect: the'measurement of how hard your heart beats at rest' is related to another cardiac parameter (not stroke volume), 'a measurement of the sound of your heartbeat' is about heart sounds, and 'the amount of blood your heart pumps to maintain what your body needs' is related to cardiac output (which is stroke volume × heart rate).

Answer:

the amount of blood your heart pumps out each time it beats