MCQs of Physiology – Cardiovascular system

The first heart sound is produced by the:

Parasympathetic stimulation of heart causes:

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

The ventricular repolarization in ECG is best seen in:

Stroke outpud of each ventricle in normal adult is:

Cardiac ouput is a measure of:

Cardiac output is not affected by :

The largest function of the total peripheral resistance is due to :

All the heart valves are open during which stage of cardiac cycle :

Minimum blood pressure is in:

Starling’s law of the heard

Consider the following statements :

Peripheral resistance is maximum in:

Stimulation of barorceptor leads to :

Increased functional demand on the heart produces increased size of the myocardium by :

Cardiac index is related to :

Absolute refractory period in heart:

Closure of aortic valve occurs before the following event :

Conduction velocityis least in:

Fastest conducting tissue in human heart :

Under resting condition the cardiac output is ______ L/ min:

Coronary blood flow is usually predominantly controlled by :

Cardiac output in L/min divided by heart rate equals :

Cardiac cycle duration in man is:

First heart sound occurs during the period of:

Absolute period when whole heart is in diastole is:

The effects of Adrenaline on heart are all except

Cardiac output is maximum to :

Increase in carotid sinus pressure produces

Effect on force of contraction of heart is

SA node acts as a pacemaker of the heart because of the fact that it:

Distribution of blood flow is mainly regulated by the:

The following factors increase the cardiac output except:

Ventricular muscle receives impulses directly from the

In determining blood pressure by ausculatory method

Isovolumetric relaxation ends immediately after

Glomerular capillary pressure differ from other capillaries of body in:

The heamoglobin oxygen saturation of blood entering the right ventricle is approximately

Which of the following increases turbulence in blood flow ?

Heart muscle, true are all except:

The velocity of conduction in the Purkinjie fibers of the heart is

2nd heart sound is characterized by all except

What is common between systemic and pulmonary circulation is

Stimulation of baroreceptors results in

The function of Carotid body is

The dicrotic notch on the aortic pressure curve is caused by