True or false: Diastole is the phase where the ventricles contract.

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 $9.99Unlock all

Study for the Certified Nursing Assistant Level I - OSBN State Certification Exam. Prepare with flashcards and multiple-choice questions, each question includes hints and explanations. Get ready for your CNA certification!

Multiple Choice

True or false: Diastole is the phase where the ventricles contract.

Explanation:
Diastole is the relaxation phase of the cardiac cycle, when the ventricles fill with blood from the atria. The ventricles contract during the other phase, systole, which pumps blood out to the lungs and rest of the body. So this statement is false. During diastole the atrioventricular valves are open and the semilunar valves are closed; during systole the ventricles contract, the AV valves close, and the semilunar valves open to eject blood. Understanding this helps you see why diastole is about filling, not contraction.

Diastole is the relaxation phase of the cardiac cycle, when the ventricles fill with blood from the atria. The ventricles contract during the other phase, systole, which pumps blood out to the lungs and rest of the body. So this statement is false. During diastole the atrioventricular valves are open and the semilunar valves are closed; during systole the ventricles contract, the AV valves close, and the semilunar valves open to eject blood. Understanding this helps you see why diastole is about filling, not contraction.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy