Angiotensin II
is a hormone that plays a crucial role in the regulation of blood pressure and fluid balance in the body. When angiotensin II is released, it has several physiological effects, including:
Vasoconstriction: Angiotensin II causes blood vessels to constrict or narrow, leading to an increase in blood pressure. This vasoconstrictive effect helps to raise systemic blood pressure.
Stimulation of Aldosterone Release: Angiotensin II stimulates the release of aldosterone from the adrenal glands. Aldosterone promotes the reabsorption of sodium and water in the kidneys, leading to an increase in blood volume and blood pressure.
Antidiuretic Hormone (ADH) Release: Angiotensin II stimulates the release of antidiuretic hormone (ADH) from the pituitary gland. ADH increases water reabsorption in the kidneys, contributing to the conservation of water and an increase in blood volume.