Question

which chemical messenger is involved in platelet aggregation and blood clotting?
nitric oxide
prostaglandins
leukotrienes
thromboxane

Explanation:

To determine the chemical messenger involved in platelet aggregation and blood clotting, we analyze each option:

• Nitric oxide: Primarily involved in vasodilation, not blood clotting.
• Prostaglandins: Have diverse roles (e.g., inflammation, pain) but not specific to platelet aggregation/clotting.
• Leukotrienes: Involved in allergic/inflammatory responses, not clotting.
• Thromboxane: A type of eicosanoid that promotes platelet aggregation and blood clot formation.

Answer:

D. Thromboxane