Heart rate in neurogenic hearts in increased by release of:
A.Acetylcholine
B.Noradrenaline
C.Both (a) & (b)
D.None of these
Category: Circulatory System Physiology Mcqs
Cardiac cycle in frog is completed in:
A.0.74 seconds
B.0.84 seconds
C.0.94 seconds
D.1.4 seconds
During average span of 50 years of life, the human heart beats about for:
A.Two bullion time
B.Twenty bullion time
C.Ten bullion time
D.Fifty bullion time
Hypoxia in our body would:
A.Increase our heart rate
B.Decrease our heart rate
C.Bring first increase then decrease
D.Not at all affect heart rate
Diastolic blood pressure in a normal healthy man is:
A.60mm of Hg
B.80mm of Hg
C.100mm of Hg
D.120mm of Hg
Which of these hearts may function even in absence of a nervous control:
A.Heart of Pila
B.Heart of rabbit
C.Both (a) & (b)
D.None of these
Slowing of heart rate in man is done by:
A.Sympathetic nerve fibres by releasing noradrenaline
B.Parasympathetic nerve fibres by releasing acetylcholine
C.Sympathetic nerve fibres by releasing acetylcholine
D.Parasympathetic nerve fibres by releasing noradrenaline
The heart rate of a person having 102?F temperature as compared to a person having normal temperature will be:
A.Increased
B.Decreased
C.Normal
D.First increased then decreased
During condition of fever the rate of our hearbeat will be:
A.Increased
B.Decreased
C.First increased then decreased
D.Unchanged
