Question

Aldosterone and ADH are two hormones that affect the reabsorption of H₂O to maintain adequate blood pressure and fluid volume of the blood. What do you know about these hormones that cause water retention?

Answer 1

Aldosterone and ADH are hormones that affect water retention in the body. Aldosterone promotes Na+ reabsorption, leading to water reabsorption. ADH stimulates the insertion of aquaporin water channels into the kidney tubules.

Step-by-step explanation:

Aldosterone and ADH are two hormones that affect water retention in the body. Aldosterone, a mineralocorticoid hormone, is released by the adrenal cortex in response to angiotensin II or increased plasma K+ levels. It enhances Na+ reabsorption from the extracellular fluid in the kidney tubules, leading to water reabsorption. ADH, also known as vasopressin, is produced by the hypothalamus and regulates the amount of water excreted by the kidneys. It promotes the reabsorption of water by stimulating the insertion of aquaporin water channels into the kidney tubules.

Aldosterone and ADH play crucial roles in water retention. Aldosterone, a mineralocorticoid released by the adrenal cortex in response to angiotensin II or elevated plasma K+ levels, enhances Na+ reabsorption in kidney tubules, facilitating water reabsorption. Meanwhile, ADH, or vasopressin, produced by the hypothalamus, regulates renal water excretion. It achieves this by stimulating the insertion of aquaporin water channels into kidney tubules, promoting water reabsorption. Together, these hormones finely modulate water balance in response to varying physiological conditions, ensuring optimal hydration levels in the body.