Final answer:
Angiotensin II stimulates drinking by acting on cells within the 4. subfornical organ and influences both aldosterone release and the hypothalamic thirst center to regulate blood volume and pressure.
Step-by-step explanation:
Angiotensin II stimulates drinking by acting on cells within the subfornical organ. This powerful vasoconstrictor not only greatly increases blood pressure but also stimulates the release of ADH and aldosterone. The latter is produced by the adrenal cortex and increases the reabsorption of sodium into the blood by the kidneys. As water follows sodium, this boosts the reabsorption of water and consequently increases blood volume and pressure. Angiotensin II further affects the thirst center, which resides in the hypothalamus, thereby prompting the individual to consume more fluids, which in turn, increases blood volume and blood pressure.