NEET Biology question

Which test tube is not used from the given option for keeping the blood in non-coagulated state? (for analysis of blood corpuscles)

(A)Test tube with heparinCorrect
(B)Test tube with calcium bicarbonate
(C)Test tube with sodium oxylate
(D)Test tube with low temperature

Answer: (A)

Solution

Sodium oxalate chelates the calcium ions needed for clotting, low temperature slows the enzymatic clotting cascade, and these, along with calcium bicarbonate as listed, are used in various contexts to keep collected blood from coagulating; however, although heparin is itself an effective anticoagulant, it is

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Question ID VK-116166