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NEET 2004
Exam
NEET
Year
2004
Subject
Zoology
Chapter
Body Fluids and Circulation

NEET 2004 · Zoology · Body Fluids and Circulation

You are required to draw blood from a patient and to keep it in a...

You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?

Options

  1. Atest tube containing calcium bicarbonate
  2. Bchilled test tube
  3. Ctest tube containing heparin
  4. Dtest tube containing sodium oxalate.

Correct answer

A. test tube containing calcium bicarbonate

Step-by-step solution

Calcium bicarbonate causes clotting of blood. Chilled test tube decrease the rate of coagulation of blood. Chelating agents like heparin, EDTA, sodium oxalate act as anti-coagulants. Related Theory Clotting requires calcium ions (Ca2+)\left(\mathrm{Ca}^{2+}\right) and chelating agents bind to free metal ions, such as calcium, so the blood will not clot.
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