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Question-1
Bicuspid valve regulates the flow of blood from
(A)
Left ventricle to SA-node
(B)
Left auricle to left Ventricle
(C)
Post caval to right auricle
(D)
Right auricle to right ventricle
Question-2
An open circulatory system occurs in
(A)
Man
(B)
Reptiles
(C)
Animals
(D)
Insects
Question-3
Which of the following carries blood from lung to heart?
(A)
Carotid
(B)
Cardiac vessel
(C)
Pulmonary vein
(D)
Pulmonary artery
Question-4
Which of the following decreases during aerobic exercise?
(A)
Skin temperature
(B)
Cerebral blood flow
(C)
Mean blood pressure
(D)
Volume of circulating blood
Question-5
Pacemaker is
(A)
SA-node
(B)
AV-node
(C)
SV-node
(D)
VA-node
Question-6
The myocardium is found in
(A)
Heart of mammals
(B)
Brain of mammals
(C)
Lungs of mammals
(D)
Testis of mammals
Question-7
Which of the following statements is correct about veins?
(A)
They do not have valves
(B)
They carry blood towards heart
(C)
They always carry oxygenated blood
(D)
They always carry de-oxygenated blood
Question-8
Which of the following vertebrate organ receives only oxygenated blood?
(A)
Gill
(B)
Lung
(C)
Spleen
(D)
Liver
Question-9
The right auricle of heart also receives a small coronary sinus and its opening is guarded by
(A)
Mitral valve
(B)
Scroll valve
(C)
Valve of Thebesius
(D)
Valve of Custachius
Question-10
Diastole is
(A)
Increase arteries
(B)
Contraction of heart
(C)
Relaxation of heart muscles
(D)
None of these
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Plus 2 Biology Science
ICSE/ISC
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