Dehydration and diabetes insipidus cause which change in urine specific gravity?

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Prepare for the Mark Klimek Electrolytes and Endocrine Test. Utilize flashcards, multiple choice questions, and detailed explanations for each query to enhance your understanding. Ace your exam!

Multiple Choice

Dehydration and diabetes insipidus cause which change in urine specific gravity?

Explanation:
Urine specific gravity shows how concentrated your urine is, which mainly depends on water reabsorption in the collecting ducts governed by ADH. When you’re dehydrated, ADH release increases, the kidneys conserve water, and urine becomes more concentrated, so the specific gravity rises. In diabetes insipidus, there’s little or no ADH effect, so the kidneys cannot concentrate urine, leading to large volumes of dilute urine and a lower specific gravity. Because these two conditions push urine concentration in opposite directions, the net change in specific gravity is variable—it depends on which process dominates at that moment.

Urine specific gravity shows how concentrated your urine is, which mainly depends on water reabsorption in the collecting ducts governed by ADH. When you’re dehydrated, ADH release increases, the kidneys conserve water, and urine becomes more concentrated, so the specific gravity rises. In diabetes insipidus, there’s little or no ADH effect, so the kidneys cannot concentrate urine, leading to large volumes of dilute urine and a lower specific gravity. Because these two conditions push urine concentration in opposite directions, the net change in specific gravity is variable—it depends on which process dominates at that moment.

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