When the proteins involved in clotting are removed from blood plasma, the remaining liquid is called __ .

Options

A. water
B. urea
C. ground substance
D. serum

Answer

To answer the question, "When the proteins involved in clotting are removed from blood plasma, the remaining liquid is called __," follow these steps:

1. **Understand Blood Components**: Blood consists of several components, including red blood cells, white blood cells, platelets, and plasma. Plasma is the liquid portion of blood that contains water, electrolytes, nutrients, hormones, and proteins, including clotting factors.

2. **Identify Clotting Factors**: Clotting factors are specific proteins in the plasma that are essential for the blood coagulation process. These proteins help in forming a clot to stop bleeding.

3. **Removal of Clotting Factors**: When clotting factors are removed from plasma, the remaining liquid is devoid of these proteins. This process typically involves allowing blood to clot and then removing the clot, which contains the clotting factors.

4. **Define the Remaining Liquid**: The liquid that remains after the clotting factors have been removed from plasma is known as serum. Serum is essentially plasma without the clotting proteins.

5. **Conclusion**: Therefore, the answer to the question is that the remaining liquid, when the proteins involved in clotting are removed from blood plasma, is called serum.

**Final Answer**: Serum