Question

Which of the following intrinsic or extrinsic changes would result in an increase in stroke volume? Group of answer choices An increase in diastolic blood pressure A decrease in preload A decrease in ventricular compliance An increase in venous return Arterial constriction

Answer 1

An increase in diastolic blood pressure

Step-by-step explanation:

Stroke volume is defined as the volume of blood let out from the left ventricle in a single heartbeat.

Diastolic pressure is the pressure on the arterial wall between heartbeats.

As Stroke volume increases, end diastolic volume increase slightly. This increased disatolic volume leads to the Frank-Starling mechanism which contributes to the increased stroke volume (stroke volume increases when end-diastolic volume increases). Since pressure and volume are directly proportional, an increase in stroke pressure also leads to an increase in the diastolic pressure.

Answer 2

Answer: An increase in diastolic blood pressure.

Explanation: Stroke volume is defined in cardiovascular physiology as the volume of blood that is pumped from the left ventricle per heart beat.

An increased diastolic blood pressure, which can also be called diastolic hypertension, is when the they extra strain on the heart and blood vessels.

An increased diastolic blood pressure increases the stroke volume, because when the diastolic blood pressure increases, it create an extra strain in the heart and blood vessels, which will cause the left ventricle to pump in more blood per beat.