An increase in sympathetic stimulation of the heart would increase stroke volume by increasing __________.

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An increase in sympathetic stimulation of the heart would increase stroke volume by increasing __________.

The Correct Answer is

contractility.* Increased sympathetic activity increases heart contractility. This causes cardiac fibers to contract more forcefully at all levels of preload. Regardless of end diastolic volume, this mechanism increases stroke volume by reducing end systolic volume.

Reason Explained

contractility.* Increased sympathetic activity increases heart contractility. This causes cardiac fibers to contract more forcefully at all levels of preload. Regardless of end diastolic volume, this mechanism increases stroke volume by reducing end systolic volume. is correct for An increase in sympathetic stimulation of the heart would increase stroke volume by increasing __________.

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