Which of the following best describes the role of platelets in blood clotting? Platelets initiate vascular spasm closing off a blood vessel Damaged tissue causes platelets to dissolve into small pieces which diffuse into tissue and recruit the elements of the clotting cascade Platelets create a network of fibers that hold together a clot Damaged tissue causes platelets to stick to each other and the damaged tissue, leading to the formation of a platelet plug
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They do this by sticking to the damaged blood vessel and forming a plug. Show more…
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Formation of a blood clot (select the INCORRECT statement) Platelets have receptors on their membranes that bind to tissue factor. Platelets that are not in direct contact with collagen can become activated and participate in the formation of a platelet plug. Following an injury to a blood vessel, the binding of exposed tissue factor to Factor VII initiates the coagulation cascade. The coagulation cascade leads to the deposition of cross-linked fibrin polymers, which generate a stable clot. Both Factor VII (inactive) and Factor X (inactive) travel by bulk flow in the circulatory system.
Madhur L.
Which of the following statements are true of hemostasis? (Read carefully and select all the correct statements.) (4 marks) a) Platelets will stick to any rough surface. b) The greater the damage, the faster chemical clotting will begin. c) Platelet plugs are not useful in capillaries. d) Vascular spasm is not possible in capillaries because they do not have endothelium. e) Vascular spasm constricts a damaged artery and makes the break smaller. f) When a large vessel ruptures, vascular spasm must occur before chemical clotting can be useful.
Dominador T.
10. How does the nervous system coordinate and regulate blood clotting? a. Once a vessel is damaged, platelets start to cling to the injured site and release chemicals that attract more platelets. The platelets continue to pile up and release chemicals until a clot is formed. b. Once a vessel is damaged, platelets start to cling to the injured site and inhibit chemicals that attract more platelets. The platelets continue to pile up and release chemicals until a clot is formed. c. Once a vessel is damaged, platelets start to cling to the injured site and release chemicals that attract more platelets. The platelets continue to pile up and stop the chemicals until a clot is formed. d. Once a vessel is damaged, platelets will end the cling to the injured site and release chemicals that attract more platelets. The platelets continue to pile up and release chemicals until a clot is formed.
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