NEET PG DENTAL EXAM

HISTOLOGY

BLOOD VESSELS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which component of blood is responsible for helping to stop bleeding?
A
platelets
B
red blood cells
C
white blood cells
D
plasma
Explanation: 

Detailed explanation-1: -The main job of platelets, or thrombocytes, is blood clotting. Platelets are much smaller in size than the other blood cells. They group together to form clumps, or a plug, in the hole of a vessel to stop bleeding.

Detailed explanation-2: -Platelet factors so that they stick to the injured area. The “glue” that holds platelets to the blood vessel wall is von Willebrand factor, a large protein produced by the cells of the vessel wall. The proteins collagen and thrombin act at the site of the injury to induce platelets to stick together.

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