During which phase are the ventricles relaxed with all valves closed?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study the AQA A Level PE Test for The Cardiovascular System. Prepare with flashcards and multiple choice questions, each with explanations. Get ready for exam success!

Multiple Choice

During which phase are the ventricles relaxed with all valves closed?

Explanation:
In the heart, there is a brief period in the diastolic phase when the ventricles are relaxing and no blood is moving because every valve is closed. This is when the semilunar valves have just shut and the AV valves are still closed as the ventricular pressure falls. With all valves closed, the ventricular volume stays the same while the muscle fibers lengthen as they relax. This is the isovolumetric relaxation phase. It ends when the ventricular pressure drops below the atrial pressure and the AV valves open, allowing rapid filling of the ventricles.

In the heart, there is a brief period in the diastolic phase when the ventricles are relaxing and no blood is moving because every valve is closed. This is when the semilunar valves have just shut and the AV valves are still closed as the ventricular pressure falls. With all valves closed, the ventricular volume stays the same while the muscle fibers lengthen as they relax. This is the isovolumetric relaxation phase. It ends when the ventricular pressure drops below the atrial pressure and the AV valves open, allowing rapid filling of the ventricles.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy