In SIADH, as urine volume decreases, urine specific gravity tends to

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Multiple Choice

In SIADH, as urine volume decreases, urine specific gravity tends to

Explanation:
In SIADH, ADH continues to act, pulling water back into the body at the collecting ducts. This makes the urine more concentrated. As urine volume decreases, the kidneys conserve even more water, so the urine becomes even more concentrated. That means urine specific gravity increases. The urine remains inappropriately concentrated despite low serum osmolality, which is a hallmark of SIADH. Choices that imply the urine would dilute or stay the same don’t fit the effect of excess ADH on water reabsorption.

In SIADH, ADH continues to act, pulling water back into the body at the collecting ducts. This makes the urine more concentrated. As urine volume decreases, the kidneys conserve even more water, so the urine becomes even more concentrated. That means urine specific gravity increases. The urine remains inappropriately concentrated despite low serum osmolality, which is a hallmark of SIADH.

Choices that imply the urine would dilute or stay the same don’t fit the effect of excess ADH on water reabsorption.

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