Platelets participate in hemostasis by:

A. aggregating to form a plug and manufacturing fibrinogen.
B. secreting nitric oxide and releasing chemicals that promote vasoconstriction.
C. secreting prostacyclin, which prevents platelet aggregation on blood vessel endothelium.
D. aggregating to form a plug and releasing chemicals that promote vasoconstriction.
E. secreting tissue plasminogen activator (t-PA) whenever they come into contact with collagen.


D

Anatomy & Physiology

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