Final answer:
Angiotensin II stimulates Na/H exchangers in the PCT, resulting in increased sodium reabsorption and ultimately raising blood pressure.
Step-by-step explanation:
Angiotensin II is a powerful vasoconstrictor that increases blood pressure. It stimulates the release of ADH and aldosterone, which increases the reabsorption of sodium into the blood. This ultimately increases blood volume and pressure. Additionally, Angiotensin II stimulates the thirst center in the hypothalamus, leading to increased fluid consumption and further raising blood volume and pressure.