According to the Frank-Starling mechanism of the heart, an increase in end-diastolic volume directly leads to which of the following?

A Decreased stroke volume

B Increased heart rate

C Increased force of contraction

D Decreased venous return

✓ Correct Answer: Option C

The Frank-Starling mechanism states that an increased end-diastolic volume (preload) stretches cardiac muscle fibers, leading to a more optimal actin-myosin overlap and thus an increased force of contraction and stroke volume.

💡 Why is C) the correct answer?

The correct answer to the question "According to the Frank-Starling mechanism of the heart, an increase in end-diastolic volume directly leads to which of the following?" is Option C: Increased force of contraction.

The other options — A) Decreased stroke volume, B) Increased heart rate, D) Decreased venous return — are incorrect for this USMLE Exam Prep question. As explained above: The Frank-Starling mechanism states that an increased end-diastolic volume (preload) stretches cardiac muscle fibers, leading to a more optimal actin-myosin overlap and thus an increased force of con…

📚 About This USMLE Exam Prep Practice Question

This 2-level USMLE Exam Prep question from the Step 1 – Basic Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free USMLE Exam Prep practice test or use flashcards for spaced repetition review.

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According to the Frank-Starling mechanism of the heart, an increase in end-diastolic volume directly leads to which of the following?

✓ Correct Answer: Option C

📚 About This USMLE Exam Prep Practice Question

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