What effect does aspirin have on blood clotting?

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Study for the Nassau County EMT Test. Prepare with flashcards and multiple-choice questions. Each question is accompanied by hints and explanations. Get ready for your exam!

Multiple Choice

What effect does aspirin have on blood clotting?

Explanation:
Aspirin slows blood clotting by changing how platelets function. It permanently blocks the enzyme COX-1 in platelets, which stops the production of thromboxane A2, a chemical that promotes platelet aggregation and vasoconstriction. Since platelets can’t make new COX-1, this anti-platelet effect lasts for the platelet’s lifetime (roughly 7–10 days). The result is reduced platelet clumping and slower formation of a clot. It doesn’t immediately stop bleeding, and it doesn’t increase clotting—rather, it reduces the ability of platelets to form clots quickly.

Aspirin slows blood clotting by changing how platelets function. It permanently blocks the enzyme COX-1 in platelets, which stops the production of thromboxane A2, a chemical that promotes platelet aggregation and vasoconstriction. Since platelets can’t make new COX-1, this anti-platelet effect lasts for the platelet’s lifetime (roughly 7–10 days). The result is reduced platelet clumping and slower formation of a clot. It doesn’t immediately stop bleeding, and it doesn’t increase clotting—rather, it reduces the ability of platelets to form clots quickly.

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