Category: Circulatory System Physiology Mcqs

A.Noradrenaline
B.Acetylcholine
C.Both (a) & (b)
D.None of these

A.Node of Tawara
B.AV-Node
C.Perkinjie fibre
D.All of these

A.Their own diastole which occurs earlier
B.The next artrial systole
C.Both of these stages
D.None of these

A.Activation of SA-Node
B.Contraction of ventricles
C.Discharge of impulse from AN-Node
D.Beginning of ventricular relaxation

A.Parasympathetic nerve fibres from vagus nerve
B.Sympathetic nerve fibres from some spinal nerves
C.Both (a) & (b)
D.None of these

A.0.1 second and 0.7 second
B.0.3 second and 0.5 second
C.0.2 second and 0.6 second
D.0.4 second and 0.4 second

A.1mm per second
B.2mm per second
C.5mm per second
D.None of these

A.10% of cardiac output
B.20% of cardiac output
C.30% of cardiac output
D.30% of cardiac output

A.Presence of excess oxygen into blood
B.Presence of pace-maker in the heart
C.Presence of thyroxine in the blood
D.Volume of blood in the system

A.Vagus nerve
B.Glossopharyngeal nerve
C.Autonomic system
D.None of these