During which stage of the cardiac cycle, tricuspid and bicuspid valves are pushed open by the pressure in the atria exerted by the blood emptied into them by the veins

Which of the following statement is CORRECT ? I. Heart, the mesodermally derived organ, is situated in the thoracic cavity, in between the two lungs , slightly tilted to the left. II. During joint diastole , tricuspid and bicuspid valves are open and the semilunar values are closed. III. The first heart sound (lub) is associated with the closure of the tricuspid and biscuspid valves whereas the second heart sound (dub) is associated with the closure of the semilunar valves . IV. Neural signals through the sympathetic nerves can increases the rate of hearbeat, the strength of ventricular contraction and thereby the cardiac output.

During which of the following of the following events of cardiac cycle, AV valves remain closed?

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 venae cavae flows into the left and right ventricles respectively through the left and right atria V. The semilunar valves are closed

What will happen during the ventricular systole? a. Bicuspid and tricuspid valves are open b. Bicuspid and tricuspid valves are closed (c ). Semilunar valves are open d. Semilunar valves are close

Assertion : In joint diastole, all the four chamber of heart are in relaxed state. Reason : The tricuspid and bicuspid valves are open and semilunar valves are closed at this stage.

Which is correct about joint diastole? a. Bicuspid and tricuspid valves are open b. Bicuspid and tricuspid valves are closed c. Semilunar valves are open d. Semilunar valves are closed