Question

Blood colloid osmotic pressure is maintained by
A. Albumin
B. Globulin
C. Fibrinogen
D. Thrombin

Answer 1

Hint:-Colloid osmotic pressure is a type of protein-induced osmotic pressure in the plasma (blood/liquid) of a blood vessel that replaces water molecules, causing a relative water molecule deficiency with water molecules flowing back into the circulatory system inside the capillary end of the lower vascular pressure.

Complete answer:
Each of the given options is discussed below:
- Albumin- Serum albumin, a protein present in plasma in the blood that serves to maintain the osmotic pressure between the tissues and the blood vessels. In blood plasma, serum albumin accounts for 55 percent of the overall protein. Circulating blood appears to push liquid into the tissues and out of the blood vessels, resulting in oedema (swelling from excess fluid). The colloid form of albumin holds the fluid inside the blood vessels, and to a lesser degree, of other blood proteins called globulins.
- Globulins – In your blood, globulins are a community of proteins. In liver function, blood clotting, and the fight against infection, globulins play an important role.
- Fibrinogen – is a protein that is necessary for the proper formation of blood clots, specifically the clotting factor (factor I).
- Thrombin – an enzyme that converts fibrinogen to fibrin, and a reaction that leads to the formation of a fibrin clot, is produced by blood-clotting proteins.
So, the correct answer is option (A).

Note:- Albumin also serves as a carrier for two materials required for blood clotting control: (1) antithrombin, which prevents the thrombin clotting protein from functioning unless required, and (2) heparin cofactor, which is essential for heparin to work as an anti-clotting agent. In liver diseases such as cirrhosis or hepatitis, the serum albumin level falls and increases.