Which of the following is NOT a function of white blood cells? activation of a f

Question

Which of the following is NOT a function of white blood cells? activation of a factor which triggers the clotting cascade. production of antibodies. destruction of cancer cells. phagocytosis of foreign invaders. phagocytosis of cellular debris. Erythrocytes do not contain a nucleus. survive an average of 120 days. do not have the ability to use O2 for energy production despite the fact that they transport O2 to all the other tissues of the body. are formed in the red bone marrow. all of these answers. The venous valves actively contract to force blood uphill against gravity. passively close to prevent the backflow of blood in the veins. are positioned at the entrances to the atria. both (b) and (c) above. all of these answers.

Explanation / Answer

1. A) Cause: Intrinsic or extrinsic pathway of cascade mechanism of blood clotting are carried out by Platelets.

2. E) All of these listed here are true about Erythrocytes(R.B.C)

3. E) All of these listed here are true about venous valves,

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