NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Science
NDA 2025 · General Ability · General Science
Clotting of blood involves which one among the following clotting...
Clotting of blood involves which one among the following clotting proteins?
Options
- APathogen
- BFibrinogen
- CMacrophage
- DPhagocytes
Correct answer
B. Fibrinogen
Step-by-step solution
Blood clotting or coagulation is a process that prevents excessive bleeding when a blood vessel is injured. Platelets and proteins in the plasma work together to stop the bleeding by forming a clot over the injury.
Fibrinogen is a soluble plasma glycoprotein synthesized by the liver. During the blood coagulation cascade, the enzyme thrombin converts fibrinogen into insoluble fibrin threads, which form a mesh that traps red blood cells and platelets to form a stable blood clot.
Pathogens are disease-causing microorganisms. Macrophages and phagocytes are types of white blood cells involved in the immune response and phagocytosis, not directly in the formation of the structural mesh of a blood clot.
Answer: Fibrinogen
Fibrinogen is a soluble plasma glycoprotein synthesized by the liver. During the blood coagulation cascade, the enzyme thrombin converts fibrinogen into insoluble fibrin threads, which form a mesh that traps red blood cells and platelets to form a stable blood clot.
Pathogens are disease-causing microorganisms. Macrophages and phagocytes are types of white blood cells involved in the immune response and phagocytosis, not directly in the formation of the structural mesh of a blood clot.
Answer: Fibrinogen