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UPSC Prelims 2024 Question on – Nitric Oxide Function in Human Body | Vasodilation
Q. Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow?
✅ Correct Answer: (a) Nitric oxide
Explanation:
- Nitric oxide (NO) is produced in the body from L-arginine by the enzyme nitric oxide synthase (NOS).
- It is a powerful vasodilator—it relaxes smooth muscles of blood vessels.
- This leads to increased blood flow and helps regulate blood pressure.
- It also functions as a signalling molecule and neurotransmitter.
