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Fundamental Organisation Human Physiology Circulation - Questions and Answers

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21. Of the total quantity of the blood, plasma constitutes about
A. 40%
B. 50%
C. 55%
D. 60%
Explanation:
22. The second heart sound is caused by the
A. Closure of atrio-ventricular valves
B. Closure of semi-lunar valves
C. Opening of atrio-ventricular valves
D. Opening of semi-lunar valves
Explanation:
23. The heart beat radiates all over the heart through the
A. Atrio ventricular node
B. Sinu-auricular node
C. Papillary muscles
D. Mitral valve
Explanation:
24. The life span of WBC is about
A. a few days
B. 2 - 3 weeks
C. 4 - 5 weeks
D. 2 - 3 months
Explanation:
25. The lymphocyte in the human blood is a
A. Granulocyte
B. Agranulocyte
C. Thrombocyte
D. Immunocyte
Explanation:
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