A pace-maker is found in the:
A.Liver
B.Brain
C.Heart
D.Lungs
Category: Circulatory System Physiology Mcqs
Fall in the concentration of CO2 in one’s blood will induce:
A.Bradycardia
B.Tachycardia
C.Both (a) & (b)
D.None of these
Flow in medium sized arteries is:
A.250mm per second
B.125mm per second
C.300mm per second
D.400mm per second
Pacemaker of the heart is situated:
A.In the wall of right auricle close to Eustachian valve
B.On interauricular septum
C.On interventricular septum
D.In the wall of left auricle close to the opening of pulmonary vein
Flow of blood in the capillaries of man will be:
A.1/500 times that of aorta
B.1/250 times that of aorta
C.1/750 times that of aorta
D.None of these
An increase in the heart rate is termed:
A.Bradycardia
B.Tachycardia
C.Tachybradycardia
D.None of these
Persons suffering from hypertension should take following precautions in order to avoid excessive rise in he their blood pressure:
A.Avoid standing
B.Avoid emotional disturbances and excitements
C.Sleep as much as possible
D.Increase their body weight
Role of pace-maker is:
A.To increase heart beat
B.To decrease the heart beat
C.To initiate the heart beat
D.To control the blood supply to heart
Pace-maker in heart of man influences:
A.Contraction of pelvis
B.Rate of heartbeat
C.Contraction of heart muscles
D.Nerve impulse formation
Pulse is defined as:
A.An alternate expansion and recoil of an artery
B.Ventricular systole during which bllod is passed into ventricles of heart
C.Clossure of semilunar valves at the entrance of aortae
D.None of these
