How does antidiuretic hormone (ADH) influence the regulation of water output in the body?

• A. ADH decreases water reabsorption in the kidneys, increasing urine output.
• B. ADH stimulates the adrenal glands to release aldosterone, increasing urine output.
• C. ADH increases water reabsorption in the kidneys, reducing urine output.
• D. ADH inhibits the release of renin, leading to increased urine output.

Answer: (C)

Verified step by step guidance

1. Understand the role of antidiuretic hormone (ADH): ADH is a hormone that helps regulate water balance in the body by influencing the kidneys.
2. Recognize the primary function of ADH: ADH increases the permeability of the kidney's collecting ducts to water, allowing more water to be reabsorbed back into the bloodstream.
3. Analyze the effect of increased water reabsorption: When more water is reabsorbed, less water is excreted as urine, leading to a decrease in urine output.
4. Identify the incorrect statements: ADH does not decrease water reabsorption or stimulate aldosterone release to increase urine output. It also does not inhibit renin release to increase urine output.
5. Conclude with the correct statement: ADH increases water reabsorption in the kidneys, which reduces urine output, helping to maintain body fluid balance.