Which of the following body substances causes increased
gastric secretion, dilation of capillaries, and constriction of the
bronchial smooth muscle?
a) Histamine
When cells are damaged, histamine is released.
b) Bradykinin
Bradykinin is a polypeptide that stimulates nerve fibers and causes
pain.
c) Serotonin
Serotonin is a chemical mediator that acts as a potent vasoconstrictor
and bronchoconstrictor.
d) Prostaglandin
Prostaglandins are unsaturated fatty acids that have a wide
assortment of biologic activity.

1 Answer

Answer :

a) Histamine
When cells are damaged, histamine is released.

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