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Biology Class 11 Chapter 12 - Circulation - 5
1.
The lubb sound of heart is caused by the vibration of?
a) semilunar valve
b) atrioventricular valve
c) tricuspid valve
d) bicuspid valve
2.
Which one of the following is a component of the conduction system?
a) sinoatrial node
b) conducting myofibrils
c) all of these
d) atrioventricular node
e) atrioventricular bundle
3.
Which one of the following is a pacemaker of the heart?
a) Conducting myofibrils
b) SA node
c) AV node
d) AV bundle
4.
The disturbance in the electrical rhythm of heart is known as?
a) myocarditis
b) endocarditis
c) cardiac cycle
d) cardiac arrythmia
5.
When the heartbeat is less than 40 beats per minute, the condition
Is known as?
a) tachycardia
b) pseudocardia
c) myocardia
d) bradycardia
6.
When the heartbeat is more than 100 beats per minute, the
Condition is known as?
a) myocardia
b) bradycardia
c) tachycardia
d) pseudocardia
7.
Increase in size of heart is known as?
a) myocardial hypertrophy
b) angina
c) ischemia
d) infarction
8.
Which one of the following is Not a blood vessel?
a) vein
b) capillary
c) ventricle
d) artery
9.
Which one of the following carry blood away from the heart?
a) none of these
b) arteries
c) veins
d) both of these
10.
SA node developes from?
a) valves
b) ventricle
c) aorta
d) sinus venosus
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