Biology · PYQ NEET UG 2022

Which one of the following statements is correct?

1. A
   Blood moves freely from atrium to the ventricle during joint diastole.
2. B
   Increased ventricular pressure causes closing of the semilunar valves.
3. C
   The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction
4. D
   The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria