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Practice Question

What causes a higher stroke volume?

Answer Choices:

Correct Answer:

Increased preload

Rationale:

✍️ Stroke volume is the amount of blood ejected by the ventricle during each heartbeat.

✍️ Preload refers to the degree of stretch of the cardiac muscle fibers at the end of diastole.

✍️ When preload increases, ventricular filling rises, leading to stronger contractions by the Frank-Starling mechanism.

✍️ This results in a higher stroke volume because the heart pumps out more blood.

✍️ Increased afterload or decreased contractility would lower stroke volume, not increase it.

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From Exam
WGU Anatomy and Physiology with lab

74 Questions

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Question Details
  • Category: PRE-REQUISITES NURSING COURSES
  • Subcategory: ANATOMY & PHYSIOLOGY
  • Domain: ANATOMY & PHYSIOLOGY I
  • Answer Choices: 4
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