Blood Platelets


 
 
Concept Explanation
 

Blood Platelets

Blood Clotting by Platelets:

Platelet cells are present in our blood and they circulate all around the body through it. Whenever there is bleeding these platelets act as a plug to stop it. The clot, which forms at the point of wound, is a microscopic network of insoluble fibrous protein. The cells have granules but no nucleus.

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Sample Questions
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Question : 1

Which of the following are correct ?

(a) Blood platelets live for 5-9 days. There are about 250,000-500,000 platelets per microlitre of blood.

(b) If number of platelets decreases in our blood it could lead to excess of bleeding that could be fatal for us.

Right Option : B
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Question : 2

If number of platelets _____________  in our blood it could lead to excess of bleeding that could be fatal for us.

Right Option : A
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Question : 3

Which of the following are correct ?

(a) Platelet cells are present in our blood and they circulate all around the body through it.

(b) There is bleeding these platelets act as a plug to stop it.

(c) The clot, which forms at the point of wound, is a microscopic network of insoluble fibrous protein.

Right Option : D
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