- 1(current)
Q. No.Which one of the following statements is correct?
| 1. | Increased ventricular pressure causes closing of the semilunar valves. |
| 2. | The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction. |
| 3. | The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria. |
| 4. | Blood moves freely from atrium to the ventricle during joint diastole. |
Subtopic: Â Human Heart: Cardiac Cycle |
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:
| 1. | AV valves open up |
| 2. | Ventricular walls vibrate due to the gushing of blood from the atria |
| 3. | Semi-lunar valves close down after the blood flows into vessels from the ventricles |
| 4. | AV node receives a signal from SA node |
Subtopic: Â Human Heart: Cardiac Cycle |
 92%
From NCERT
NEET - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh
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- 1(current)
Q. No.
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