A. Increase in heart rate
B. Decreased vagal discharge
C. Increased sympathetic discharge
D. Decrease in blood pressure
0
2nd heart sound is characterized by all except______________?
0
Heart muscle, true are all except_______________?
A. Due to closure of semilunar valves
B. Is occasionally split
C. Has longer duration than 1st heart sound
D. Marks the onset of diastole
0
Isovolumetric relaxation ends immediately after________________?
A. Act as syncytium
B. Has multiple nuclei
C. Has gap junctions
D. Has branching
0
Ventricular muscle receives impulses directly from the_______________?
A. AV Valve closes
B. When ventricular pressure falls below aortic pressure
C. When ventricular pressure falls below atrial pressure
D. None of the above
0
Distribution of blood flow is mainly regulated by the________________?
A. Purkinje system
B. Bundle of HIS
C. Right and left bundle branches
D. AV node
0
Effect on force of contraction of heart is_____________?
A. Arteries
B. Arterioles
C. Capillaries
D. Venules
0
Cardiac output is maximum to _________________?
A. Chronotropic effect
B. Dromotropic effect
C. Bathmotropic
D. Ionotropic effect
0
Absolute period when whole heart is in diastole is______________?
A. Liver
B. Brain
C. Kidney
D. Heart
0
Cardiac cycle duration in man is_______________?
A. 0.7 seconds
B. 0.3 seconds
C. 0.7 seconds
D. 0.4 seconds
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