KROK 1 2018 – Question 181 · KROK (Medicine) · Physiology
Vascular endothelium is characterized by high metabolic activity and synthesizes vasoactive substances. Among these substances there is a potent vasodilator synthesized from L-arginine. Name this vasodilator:
- A. Nitrogen oxide
- B. Histamine
- C. Adrenaline
- D. Acetylcholine
- E. Bradykinin
Hint
Consider what the endothelial enzyme that uses L-arginine as its substrate produces, and how that product reaches the underlying smooth muscle to relax it.
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