81.
Systolic pressure is higher than diastolic pressure due to
A
Volume of blood in the heart is greater during systole
B
Arteries contract during systole
C
Blood vessels offer resistance to flowing blood during systole
D
Mouse
Answer :
Mouse
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82.
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when:
A
Ventricular wall vibrate due to gushing in of blood from atria
B
Semilunar valves close down after the blood flows into vessels from ventricles
C
AV node receives signal from SA node
D
AV valves open up
Answer :
Semilunar valves close down after the blood flows into vessels from ventricles
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83.
The correct route through which pulse-making impulse travels in the heart is
A
AV node → bundle of His → SA node Purkinje fibres→ heart muscles
B
AV node → SA node → Purkinje fibres → bundle of His → heart muscles
C
SA node → Purkinje fibre → bundle of His → AV node → heart muscles
D
SA node → AV node → bundle of His → Purkinje fibre → heart muscles
Answer :
SA node → AV node → bundle of His → Purkinje fibre → heart muscles
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84.
In Rabbit oxygenated blood flows
A
Left auricle to left ventricle during auricular systole
B
Right auricle to right ventricle during ventricular systole
C
Right ventricle to aorta during ventricular systole
D
Ulmonary vein to left auricle during auricular systole
Answer :
Left auricle to left ventricle during auricular systole
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85.
Pace maker influences
A
Contraction of heart muscles
B
Flow of blood in heat
C
Rate of heart beat
D
Papaver somniferum
Answer :
Contraction of heart muscles
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86.
Normal Heart rate in a two months old infant is
A
<72/mt
B
60 to 72/mt.
C
>72/mt.
D
Glenoid cavity and pectoral girdle
Answer :
>72/mt.
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87.
A vein possesses a large lumen because
A
tunica media and tunica externa form a single coat
B
tunica interna and tunica media form a single coat
C
tunica interna, tunica media and tunica externa are thin
D
tunica media is a thin coat
Answer :
tunica media is a thin coat
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88.
Ist Heart Sound is due to
A
Closure of Semilunar
B
Closure of Pulmonary & Aortic Valve
C
Vibration just after Closure of Mitral & Tricuspid valve
D
Vibration after Closure of Pulmonary & Aortic Valve
Answer :
Vibration just after Closure of Mitral & Tricuspid valve
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89.
In a normal man blood pressure is
A
120/80 mm of Hg
B
80/100 mm of Hg
C
80/120 mm of Hg
D
100/80 mm of Hg
Answer :
120/80 mm of Hg
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90.
Wall of blood capillary is made of
A
Parietal cells
B
Muscle cells
C
Transitional cells
D
Endothelial cells
Answer :
Endothelial cells
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