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प्रश्न
What are the main steps in coagulation of blood?
उत्तर
Blood clotting or coagulation occurs in a series of the following steps:
(a) The injured tissue cells and the platelets disintegrate at the site of wound to release
thromboplastin.
(b) The thromboplastin with the help of calcium ions converts inactive prothrombin into active
thrombin.
(c) Thrombin in the presence of calcium ions converts soluble fibrinogen into insoluble fibrin
which forms a mesh or network at the site of wound.
(d) The blood cells trapped in this network shrink and squeeze out the plasma to leave behind a
solid mass known as the clot.
APPEARS IN
संबंधित प्रश्न
Name the following:
Abnormal rise in RBC number.
Given below is a diagram of a smear of human blood. Study the same and answer the question that follow:
What is the main function of the parts labeled 1, 2 and 3 respectively?
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.
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.
Explain the Term
Haemopoiesis
Name the Following
The number of RBCs in men.
Name the Following
The instrument by which RBC are counted is called.
Complete the following sentence with appropriate word:
The erythrocytes contain an iron-rich pigment called __________.
Complete the following sentence with appropriate word:
The site of production of W.B.Cs in the embryo is _________
State the Function: R.B.C.
