Which one of the following is synthesised in human body that dilate blood vessels and increases blood flow?

Options

1. (a) Nitric oxide
2. (b) Nitrous oxide
3. (c) Nitrogen dioxide
4. (d) Nitrogen pentoxide

Correct Answer

(a) Nitric oxide

Explanation

Nitric oxide (NO) is a signaling molecule synthesized in the human body that causes vasodilation by relaxing the smooth muscles in blood vessel walls, thus increasing blood flow.

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