121.
Cells forming the wall of blood capillaries are called A
Oxyntic cells
B
Endothelium cells
C
Parietal
D
Physiology
Answer :
Endothelium cells
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122.
Among the following which one is not true about chordae tendinae A
They are strips of muscle fibers
B
They are attached to the valves
C
They regulate opening of valves
D
They prevent backflow of blood
Answer :
They regulate opening of valves
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123.
In mammalian embryo the pulmonary aorta communicates with carotico-systemic aorta by a narrow ductus arteriosus, in the adult this connection closes leaving A
Fossa - ovalis
B
Carotico pulmonary aperture
C
Ligamentum arteriosus
D
Wall of the lungs
Answer :
Ligamentum arteriosus
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124.
The cardiac impules that results into the heart beat is delayed at A
Internodal tract
B
AV node
C
Bundle of His
D
Purkinje fibers
Answer :
AV node
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125.
Internal elastic lamina is present in wall of A
Arteries
B
Veins
C
A and B both
D
Heart
Answer :
Arteries
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126.
Blood leaving live and moving to heart will have more concentration of A
Bile
B
Urea
C
Glycogen
D
Amino acid
Answer :
Urea
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127.
Tricuspid valve is found in between A
sinus venosus and right auricle
B
right auricle and right ventricle
C
left ventricle and left auricle
D
ventricle and aorta
Answer :
right auricle and right ventricle
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128.
Rate of heart beat is under the control of A
Autonomic nervous
B
Vagus nerve
C
Glossopharyngeal nerve
D
To aid in ventilation
Answer :
Autonomic nervous
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129.
Which one of the following statements about blood constituents and transport of respiratory gases is most accurate? A
RBCs transport oxygen whereas WBCs transport $$C{O_2}$$
B
RBCs transport oxygen whereas plasma transports only $$C{O_2}$$
C
RBCs as well as WBCs transport both oxygen and $$C{O_2}$$
D
RBCs as well as plasma transport both oxygen and $$C{O_2}$$
Answer :
RBCs as well as plasma transport both oxygen and $$C{O_2}$$
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130.
Cardiac muscles contract A
Quickly and they fatigue
B
Quickly and unfatigued
C
Slowly and are not fatigued
D
Slowly and they fatigue
Answer :
Quickly and unfatigued
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