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Biology Class 11 Chapter 12 - Circulation - 4
1.
Human heart is?
a) none of these
b) tripple pump
c) double pump
d) single pump
2.
Which one of the following is the hub of circulatory system?
a) brain
b) heart
c) lung
d) kidney
3.
The alternating relaxation and contraction of heart is known as?
a) ornithine cycle
b) cardiac cycle
c) krebs cycle
d) blood cycle
4.
Cardiac cycle is the sequence of?
a) four heartbeats
b) three heartbeats
c) two heartbeats
d) one heartbeat
5.
Contraction of heart muscles is known as?
a) diastole
b) circulation
c) cardiac
d) systole
6.
Relaxation of heart muscles is known as?
a) systole
b) circulation
c) cardiac
d) diastole
7.
The right atrium receives blood from the body through?
a) left atrium
b) vana cava
c) aorta
d) ventricle
8.
Which one of the following devices is used to hear the sounds of heart?
a) thermometer
b) micrometer
c) microscope
d) stethoscope
9.
The first heart sound is?
a) dupp
b) jubb
c) lubb
d) rubb
10.
The second heart sound is?
a) dupp
b) lubb
c) jubb
d) rubb
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