what will happen if the blood collected from a patient is subjected to a process which removes calcium

Options

A. casue delayed clotting
B. prevent clotting
C. cause immediate clotting
D. prevent destruction of haemoglobin

Explanation

To answer the question, "What will happen if the blood collected from a patient is subjected to a process which removes calcium?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Blood Clotting**: Blood clotting is a complex process that involves several proteins and ions. One of the key components in this process is calcium ions (Ca²⁺).

2. **Role of Calcium in Clotting**: Calcium ions are crucial for the conversion of prothrombin (factor II) into thrombin. Thrombin then activates fibrinogen, converting it into fibrin, which forms the mesh that constitutes a blood clot.

3. **Effect of Calcium Removal**: If calcium is removed from the blood, the conversion of prothrombin to thrombin cannot occur. Without thrombin, fibrinogen cannot be converted to fibrin, leading to a failure in the clotting process.

4. **Consequences of Calcium Deficiency**: The absence of calcium will prevent the formation of a blood clot. This means that even minor injuries could lead to excessive bleeding, as the blood will not be able to clot effectively.

5. **Conclusion**: Therefore, if blood collected from a patient is subjected to a process that removes calcium, it will completely prevent the blood from clotting, leading to a risk of uncontrolled bleeding.

### Final Answer:
Removing calcium from the blood will prevent the clotting mechanism, leading to a risk of excessive bleeding.

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