Final answer:
Angiotensin II increases blood pressure by causing vasoconstriction and promoting the reabsorption of sodium and water in the kidneys, contributing to increased blood volume.
Step-by-step explanation:
Angiotensin II is a potent vasoconstrictor that contributes to blood pressure regulation. One physiological effect of angiotensin II is that it leads to vasoconstriction of blood vessels, which increases blood pressure. It also stimulates the kidneys to reabsorb sodium, which promotes the reabsorption of water, thereby increasing blood volume and maintaining a higher blood pressure. Additionally, angiotensin II can induce the release of aldosterone from the adrenal cortex, enhancing sodium and water retention even further.