Question

what is the effect of nitric oxide in blood vessels?
multiple choice
causes increased permeability and leakiness of capillary walls
causes vasodilation
causes decreased permeability and leakiness of capillary walls
causes vasoconstriction

Explanation:

Nitric oxide is a vasodilator. It relaxes the smooth - muscle cells in the blood vessel walls, leading to vasodilation. It does not cause increased or decreased permeability and leakiness of capillary walls, nor does it cause vasoconstriction.

Answer:

B. Causes vasodilation