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.Management Sciences
Category: Cardiovascular system
Cardiac output is a measure of______________?
A. Peripheral resistance X tissue fluid
B. Peripheral resistance X cardiac rate
C. Blood pressure X cardiac rate
D. Heart rate X blood volume
Increased functional demand on the heart produces increased size of the myocardium by _______________?
A. Hyperplasia
B. Hypertrophy
C. Fatty infiltration
D. Increased amounts of fibrous connective tissue
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
Parasympathetic stimulation of heart causes______________?
A. SA node decreases firing
B. Increased AV node excitability
C. Decreased ventricular contraction
D. Tachycardia
Ventricular muscle receives impulses directly from the_______________?
A. Purkinje system
B. Bundle of HIS
C. Right and left bundle branches
D. AV node
Stroke output of each ventricle in normal adult is_____________?
A. 30 ml
B. 130 ml
C. 70 ml
D. 5 liters
The ventricular repolarization in ECG is best seen in_______________?
A. “P” wave
B. “Q” wave
C. “R” wave
D. “T” wave
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
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