Normally, the rate of the heart beat in a human is determined by _________________?

Related Mcqs:

Absolute refractory period in heart______________?

A. Lasts till cardiac contraction B. Longer than refractory period in skeletal muscle C. A phase of cardiac cycle in which heart cannot be stimulated by any amount of stimulus D. Corresponds with duration of action potential E. All of the above...

Which of the following increases turbulence in blood flow ?

A. Reynolds number < 2000 B. Decrease in velocity of blood C. Decrease in density of blood D. Increase in diameter of blood vessel...

Consider the following statements________________?

A. Starling’s law of heart states that increase in force of contraction is directly related to cardiac ouput B. Staling’s law of heart states that the force of ventricular contraction is directly related to the end diastolic volume C. Both A and B D. None of the above...

Cardiac index is related to ______________?

A. cardiac output and body weight B. Cardiac output and body surface area C. Cardiac output and work of the heart D. Stroke volume and pulse rate...

Ventricular muscle receives impulses directly from the_______________?

A. Purkinje system B. Bundle of HIS C. Right and left bundle branches D. AV node...