Question

How histamine acts as potent vasodilator?

Answer 1

histamine is a potent vasodillator which means histamine has a great ability to dilate the blood , the blood vessels and thus prevent muscle tightening .

Histamine is a potent vasodilator. It performs various functions in the body

(i) It contracts muscles in gut and bronchi.
(ii) It relaxes some other muscles, e.g., in the walls of blood.vessels. ci (iii) It is responsible Tor congestion in the nose associated with common cold and allergies.
(iv) It stimulates the release of pepsin and HCl in stomach.