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.Management Sciences
A. Closure of the aortic and pulmonary valves
B. Opening of the aortic and pulmonary valves
C. Closure of the mitral and tricuspid valves
D. Opening of the mitral and tricuspid valves
Related Mcqs:
- 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...
- 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...
- Parasympathetic stimulation of heart causes______________?
- A. SA node decreases firing B. Increased AV node excitability C. Decreased ventricular contraction D. Tachycardia...
- Distribution of blood flow is mainly regulated by the________________?
- A. Arteries B. Arterioles C. Capillaries D. Venules...
- Ventricular muscle receives impulses directly from the_______________?
- A. Purkinje system B. Bundle of HIS C. Right and left bundle branches D. AV node...
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