How many times does the heat of man beats per minute
A.52 times
B.62 times
C.72 times
D.82 times
Category: Circulatory System Physiology Mcqs
Bundle of His in mammalian heart extends through:
A.Wall of right auricle via auriculo-ventricular aperture
B.Wall of left auricle via left auriculo-ventricular aperture
C.Interventricular septum
D.None of these
The relaxation of heart during heart beat is called:
A.Systole
B.Diastole
C.Diastasis
D.None of these
The impulse from SA-Node to AV-Node is conducted by means of:
A.Wall of right auricle itself
B.A bundle of specialized fibres
C.Bundle of His
D.None of these
Percentage of blood contained in pulmonary circulation in man is:
A.16%
B.20%
C.25%
D.12%
The rate of conduction through bundle of His is:
A.Fast
B.Very fast
C.Slow
D.Very slow
Parasympathetic nerve fibres decrease the rate of heartbeat by releasing which of these at their free endings:
A.Acetylcholine
B.Adrenaline
C.Noradrenaline
D.None of these
A person having bradycardia is likely to have which of the following:
A.Increase in concentation of blood oxygen level
B.Low temperature of his body
C.Both (a) & (b)
D.None of these
Sympathetic nerve fibres increase the rate of heartbeat by releasing which of these at their free endings:
A.Adrenaline
B.Noradrenaline
C.Acetylcholine
D.None of these
Blood pressure is the force which:
A.Heart exerts on blood going out of it
B.Blood pushes against the walls of blood vessels
C.Blood vessels exert on the blood
D.None of these but something else
