21. Coronary artery supplies blood to

A Mammary glands
B Ribmuscles
C Skin
D Heart
Answer :   Heart
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22. Dup' sound is produced during closure of

A Semilunar valves
B Bicuspid valve
C Tricuspid valve
D Both b and c
Answer :   Semilunar valves
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23. The blood leaving the lungs is richer than the blood entering the lung in

A Oxygen
B CO2
C Hydrogen
D Moisture
Answer :   Oxygen
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24. Normal pulse pressure is

A 80 mm Hg
B 120 mm Hg
C 40 mm Hg
D 320 mm Hg
Answer :   40 mm Hg
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25. Removal of calcium from freshly collected blood would

A cause delayed clotting
B prevent clotting
C cause immediate clotting
D prevent destruction of haemoglobin
Answer :   prevent clotting
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26. Component of blood responsible for producing antibodies is

A Thrombocytes
B Monocytes
C Erythrocytes
D Lymphocytes
Answer :   Lymphocytes
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27. Mitral valve is the other name of

A Valve found in venacava
B Valve found at the base of dorsal aorta
C Tricuspid valve
D More than one option are correct
Answer :   More than one option are correct
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28. In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

A S - start of systole
B T - end of diastole
C P - depolarisation of the atria
D R - repolarisation of ventricles
Answer :   P - depolarisation of the atria
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29. Wall of heart is covered externally by

A Pericardium
B Epithelium
C Endothelium
D Glisson's capsule
Answer :   Pericardium
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30. Carotico - systemic arch aries from

A Right auricle
B Right ventricle
C Left auricle
D Left ventricle
Answer :   Left ventricle
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