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प्रश्न
Explain the process of blood clotting.
उत्तर
Blood clotting is also known as blood coagulation. It is a process in which the Liquid blood changes into a semi-solid form known as a clot.
The process of blood clotting prevents the excessive loss of blood.
The process of blood clotting occurs in a series of following steps:
- The injured tissue cells and the platelets (thrombocytes) release thromboplastin.
- Thromboplastin helps in the formation of the enzyme prothrombinase in the presence of Ca2+ ions.
- Prothombinose inactivates heparin (anticoagulant) and also converts inactive prothrombin into active thrombin.
- Thrombin converts soluble fibrinogen into insoluble fibrin in the presence of Ca2+ ions.
- Fibrin forms a mesh or network in which platelets (thrombocytes) and other blood cells get trapped to form the clot.
संबंधित प्रश्न
Human blood clotting factor VIII is used to treat __________.
(A) pituitary dwarfism
(B) diabetes mellitus
(C) haemophilliacs
(D) cystic fibrosis
Describe five types of leucocytes, with the help of diagrams. Add a note on their functions.
Select the odd one from the following:
Which one of the following plasma proteins brings about coagulation of blood?
What is the mineral element essential to form a blood clot?
Which one of the following is not related to the clotting of blood?
Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?
1 gram of solid sodium chloride was taken in a clean and dry test tube and concentrated sulphuric acid was added to it.
- Name the gas evolved in the reaction.
- What will be observed when this gas is tested with (1) dry and (II) wet blue litmus paper?
Write your conclusion about the nature (acidic/basic) of this gas.
Name the following:
The category of vitamin required for clotting of blood.
State whether the following statement is true or false and correct the false statement.
The clear liquid that oozes out after the formation of a clot is serum.
