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Questions and Answers
Where are platelets produced and destroyed in the body?
Where are platelets produced and destroyed in the body?
- Produced in bone marrow, destroyed in spleen (correct)
- Produced and destroyed in bone marrow
- Produced and destroyed in liver
- Produced in spleen, destroyed in bone marrow
What is the approximate number of platelets in 1 mm of blood?
What is the approximate number of platelets in 1 mm of blood?
- 20 to 40 thousand
- 200 to 400 thousand (correct)
- 2 to 4 lakh
- 2 to 4 million
What is the condition called when the number of RBCs is more than normal?
What is the condition called when the number of RBCs is more than normal?
- Anaemia
- Haemophilia
- Thrombocytopenia
- Polycythemia (correct)
Which protein helps in blood-clotting with the help of clotting factors?
Which protein helps in blood-clotting with the help of clotting factors?
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What happens if the process of blood-clotting delays due to the absence of blood-clotting chemicals?
What happens if the process of blood-clotting delays due to the absence of blood-clotting chemicals?
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Study Notes
Platelet Production and Destruction
- Platelets are produced in the bone marrow through the process of thrombopoiesis.
- Old or damaged platelets are destroyed by the spleen.
Platelet Count
- The approximate number of platelets in 1 mm of blood is 200,000 to 400,000.
Blood Disorders
- The condition where the number of red blood cells (RBCs) is more than normal is called polycythemia.
Blood Clotting
- The protein that helps in blood-clotting with the help of clotting factors is fibrinogen.
- Fibrinogen is converted to fibrin, which forms a mesh that traps blood cells and platelets, creating a blood clot.
Blood Clotting Disorders
- If the process of blood-clotting delays due to the absence of blood-clotting chemicals, uncontrolled bleeding may occur.
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