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Body Fluids and Its Circulation question

2004 · Q10
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Body Fluids and Its Circulation question

2004 · Q10

NEETBiologyBody Fluids and Its CirculationMCQ+4 / −1
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 you will not use for the purpose.
  1. A
    Test tube containing calcium bicarbonate
  2. B
    Chilled test tube
  3. C
    Test tube containing heparin
  4. D
    Test tube containing sodium oxalate.
View written solutionFree

Correct answer: A

The correct option for a test tube that should not be used for the purpose of analyzing blood corpuscles and plasma is Option A: Test tube containing calcium bicarbonate.

Let's analyze each option:

  • Option A: Test tube containing calcium bicarbonate - Calcium bicarbonate can affect the coagulation process of blood. The coagulation cascade requires calcium ions (Ca2+) to function. By introducing calcium bicarbonate into the blood sample, it can potentially disrupt this process and alter the condition of the blood, making it unsuitable for accurate analysis of blood corpuscles and plasma.
  • Option B: Chilled test tube - Chilling a test tube prior to drawing blood can help to preserve certain components of the blood for analysis, especially when looking into specific enzymes or hormones. It does not interfere with the analysis of blood corpuscles and plasma. Therefore, this option is suitable for the purpose.
  • Option C: Test tube containing heparin - Heparin is used as an anticoagulant that prevents the blood from clotting, which is crucial when analyzing blood corpuscles and plasma. The presence of heparin ensures that the blood remains in a fluid state, allowing for accurate analysis of its components. Thus, this option is appropriate for the purpose.
  • Option D: Test tube containing sodium oxalate - Sodium oxalate also acts as an anticoagulant by binding calcium ions, thus preventing the blood from clotting. Like heparin, it helps keep the blood in a state suitable for analyzing blood corpuscles and plasma. Therefore, this option is suitable for the purpose.

Given this analysis, the test tube containing calcium bicarbonate (Option A) is the one that should not be used for the purpose of drawing blood for analysis of blood corpuscles and plasma, as it can interfere with the coagulation process crucial for such analysis.

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