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Question-1
Foramen ovale present only in the heart of embryos leads from the right auricle to
(A)
Left auricle
(B)
Right ventricle
(C)
Postcaval vein
(D)
Pulmonary artery
Question-2
Papillary muscles are located in
(A)
Orbits of vertebrates eyes
(B)
Dermis of mammalian skin
(C)
Heart ventricles of rabbit
(D)
Pylorus of vertebrate stomach
Question-3
Cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker, is to be grafted in him. It is likely that it will be grafted at
(A)
Sinu-atrial node
(B)
Purkinje system
(C)
Atrio-ventricular node
(D)
Atrio-ventricular bundle
Question-4
Muscular wall of the heart is externally covered by
(A)
Epithelium
(B)
Endothelium
(C)
Epicardium
(D)
Myocardium
Question-5
Which of the following vertebrate organ receives only oxygenated blood?
(A)
Gill
(B)
Lung
(C)
Spleen
(D)
Liver
Question-6
Which of the following chamber of the heart has the thickest muscular wall?
(A)
Right atrium
(B)
Left atrium
(C)
Right ventricle
(D)
Left ventricle
Question-7
Carotid artery supplies
(A)
Impure blood to liver
(B)
Impure blood to kidney
(C)
Oxygenated blood to brain
(D)
Oxygenated blood to limbs
Question-8
Eustachian valve is present in
(A)
Ear
(B)
Pharynx
(C)
Heart
(D)
Nasal chamber
Question-9
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-10
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
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Plus 2 Biology Science
ICSE/ISC
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