Which of the following is correct for platelets?

Question

Quizplus · Accepted Answer

Platelets adhere and aggregate when they contact exposed collagen in the walls of a broken blood vessel, leading to the formation of a platelet plug.

Option A is incorrect because it is the role of thrombin, not platelets, to convert prothrombin to thrombin.

Option B is incorrect because it is not platelets that form the meshwork, but rather the insoluble protein fibrin that forms the meshwork, strengthening the platelet plug.

Option D is incorrect because platelets do not release fibrinogen but rather release other factors such as ADP and thromboxane A2, which enhance platelet aggregation and activation. Fibrinogen is released from the liver and is converted into fibrin by thrombin.

Which of the Following Is Correct for Platelets