Question

multiple choice question
where do vasoactive chemicals come from?
muscle cells and nerves
skin cells
endothelial cells and platelets
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Explanation:

Vasoactive chemicals are substances that affect blood vessel tone. Endothelial cells (lining blood vessels) and platelets (involved in hemostasis and vascular responses) are known to produce vasoactive chemicals. Muscle cells and nerves don't primarily produce vasoactive chemicals for vascular regulation, and skin cells are unrelated to vasoactive chemical production.

Answer:

C. Endothelial cells and platelets