Question

Blood platelet formation occurs in
(A)Yellow bone marrow
(B)Red bone marrow
(C)Spleen
(D)Liver

Answer 1

Hint: Platelets, also known as thrombocytes, are part of blood. The main function is to react to bleeding from blood vessels and initiating a blood clot. Platelets do not have a cell nucleus and are fragments of cytoplasm.

Complete answer:
1.The bone marrow forms the elements of the blood that is platelets, red blood cells and white blood cells.
2.Red bone marrow is located in the flat bones (pelvis, sternum, cranium, ribs, vertebrae and scapula) and in the cancellous material of the long bones (femur and humerus).
3.Those platelets which make the blood are produced in the red bone marrow and also some other cells.
The inner wall of blood vessels have the endothelial cells and when any injury is caused at the endothelial layer it exposes the collagen and also other factors in blood release and helps in blood clotting. The other blood factors fascinate the platelets to the injured site.
After the activation of platelets, platelets stick together and clump formation takes place and produces their content. These contents trigger the other platelets and interact with other coagulation factors.

Hence the correct answer is option(B)

Note:There are various steps in the platelets aggregation are: Adhesion, Activation, Triggering the formation of other cells, aggregation and then wound repair take place.
The other components which helps the coagulation are GPIIb/IIIa activation, Granule secretion, , thrombin, fibrin and Factors X, Va, VIIa, XI, IX