SA node acts as a pacemaker of the heart because of the fact that it_________________?

Related Mcqs:

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

A. The bundle of His B. All cardiac muscle C. The sinoatrial node D. The cervical ganglion...

Glomerular capillary pressure differ from other capillaries of body in______________?

A. Higher filtration pressure B. Lower filtration pressure C. Both of the above D. None...

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...

Coronary blood flow is usually predominantly controlled by_____________?

A. Auto regulation B. Hormones C. Parasympathetic impulses D. Sympathetic impulse...

Absolute period when whole heart is in diastole is______________?

A. 0.7 seconds B. 0.3 seconds C. 0.7 seconds D. 0.4 seconds...