Platelet aggregation:

December 27, 2021

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is initiated at the site of an injury by conversion of fibrinogen to fibrin
is inhibited in uninjured blood vessels by the secretion of prostacyclin by intact vascular endothelium
causes morphological changes and a release of the vasodilator serotonine
is inhibited by the release of ADP and thromboxane A2

Answer: is inhibited by the release of ADP and thromboxane A2

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