Advertisements
Advertisements
प्रश्न
Write a note on coagulation of blood.
Advertisements
उत्तर
- Clotting or coagulation is the process of converting the liquid blood into a solid form. This process may be initiated by contact of blood with any foreign surface (intrinsic process) or with damaged tissue (extrinsic process).
- Intrinsic and extrinsic processes involve interaction of various substances called clotting factors by a step wise or cascade mechanism.
- There are in all twelve clotting factors numbered as I to XIII (factor VI is not in active use). Interaction of these factors occurs in cascade manner leading to formation of the enzyme thrombin.
- Thromboplastin helps in the formation of enzyme prothrombinase. This enzyme inactivates heparin and it also converts inactive prothrombin into its active thrombin.
- Thrombin converts soluble blood protein fibrinogen into insoluble fibrin. Fibrin forms a mesh in which platelets and other blood cells are trapped to form the clot.
APPEARS IN
संबंधित प्रश्न
The mineral ion needed for the formation of blood clot is :
A. Potassium
B. Sodium
C. Calcium
D. Iron
The compound formed when haemoglobin combines with carbon dioxide in blood.
Name the following:
Abnormal rise in RBC number.
Study the following diagram carefully and then answer the question that follow:
Identify the phenomenon occurring in A.
Study the following diagram carefully and then answer the question that follow :
Name the process occurring in B and C and state the importance of this process in the human body.
Differentiate between:
Blood plasma and Serum.
Name the Following
The number of RBCs in men.
Complete the following sentence with appropriate word:
The erythrocytes contain an iron-rich pigment called __________.
Complete the following sentence with appropriate word:
Non-coagulation of blood is called ___________.
Complete the following sentence with appropriate word:
When oxygen is in fairly high concentration, the haemoglobin quickly combines with it and forms an unstable compound known as _______________.
