Question

Which of the following events do not occur during joint diastole?

I. All 4 chambers of heart are in relaxed state

II. Tricuspid and bicuspid valves open

III. Action potential is conducted from SAN to AVN

IV. Blood from the pulmonary veins and vena cava flows into the left and right ventricles respectively through the left and right atria

V. The Semilunar valves are closed

• A. Only V
• B. Only III
• C. Only IV
• D. Only I and II

Answer 1

Answer: (B)

Only III