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प्रश्न
Write a note on coagulation of blood.
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.
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संबंधित प्रश्न
Give appropriate biological or technical terms for the following:
Squeezing out of white blood cells from the capillaries into the surrounding tissues.
Given below is certain structure, write the term for the functional activity.
Lymphocytes and ………………………………...
Name the following:
The soluble protein present in the blood plasma responsible for clotting.
Given below is a diagram of a smear of human blood. Study the same and answer the question that follow:
Name a soluble protein found in "4" which helps in clotting of blood.
Define the following term:
Diapedesis
The table below is designed to indicate the major arteries emerging from the aorta and supplying blood to different organs.
Fill in the blanks with suitable answers.
| Name of the Artery | Supplying to | |
| (i) | Kidney | |
| (ii) | Genital | |
| (iii) | Right forelimb | |
| (iv) | Phrenic | |
| (v) | Liver | |
| (vi) | Chest |
Differentiate between:
Blood plasma and Serum.
Give Technical Term for the following:
Name the vein in the human body which carries oxygenated blood.
The mineral element essential for the clotting of blood.
State the Function: Platelets
