Question

What is the yellowish straw colored fluid portion formed after blood clot?

• A. Serum
• B. Plasma
• C. Lymph
• D. Fibrinogen

Hint:

Difference between plasma and serum:
• Plasma contains fibrinogen.
• Serum lacks fibrinogen. Serum forms after blood clotting.

Answer 1

The Correct Option is A

Concept:
Blood consists of:
• Plasma
• Red blood cells
• White blood cells
• Platelets When blood clots:
• Fibrinogen converts into fibrin
• Clot forms
• Remaining fluid is called serum Serum is a yellowish straw-colored fluid obtained after blood clotting.

Step 1: Understand blood clotting.
During clotting: \[ \text{Fibrinogen} \rightarrow \text{Fibrin} \] Fibrin forms a network that traps blood cells and creates the clot.

Step 2: Understand serum formation.
After clot formation, the remaining liquid portion is called: \[ \boxed{\text{Serum}} \] Serum does not contain clotting factors like fibrinogen.

Step 3: Differentiate serum and plasma.
Plasma:
• Liquid part of unclotted blood
• Contains fibrinogen Serum:
• Fluid after clotting
• Does not contain fibrinogen

Step 4: Analyze options carefully.
Option (A): Serum
Correct answer. Correct. Option (B): Plasma
Present before clotting. Incorrect. Option (C): Lymph
Tissue fluid of lymphatic system. Incorrect. Option (D): Fibrinogen
Clotting protein. Incorrect.

Step 5: Choose the correct answer.
Thus, the yellowish straw-colored fluid after blood clot is: \[ \boxed{\text{Serum}} \] Hence, \[ \boxed{(1)\ \text{Serum}} \]