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  • The strength of ventricular contraction increases when SAN is stimulated byOption: 1 Vagus nerveOption:

The strength of ventricular contraction increases when SAN is stimulated by

Option: 1

Vagus nerve


Option: 2

Parasympathetic nerve


Option: 3

Sympathetic nerve 


Option: 4

All of these


Answers (1)

best_answer

 

Function of ventricular diastole -

The ventricles now relax (ventricular diastole) and the ventricular pressure falls causing the closure of semilunar valves which prevents the backflow of blood into the ventricles. definition.

- wherein

As the ventricular pressure declines further, the tricuspid and bicuspid valves are pushed open by the pressure in the atria exerted by the blood which was being emptied into them by the veins. The blood now once again moves freely to the ventricles. The ventricles and atria are now again in a relaxed (joint diastole) state, as earlier. Soon the SAN generates a new action potential and the events described above are repeated in that sequence and the process continues.

 

 Correct option is 3

 

Posted by

Anam Khan

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