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Question

Which of the following is responsible for the excretion of dilute urine?

A
More secretion of insulin
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B
Less secretion of vasopressin
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C
More secretion of aldosterone
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D
Less secretion of glucagon
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Solution

The correct option is B Less secretion of vasopressin
Vasopressin facilitates water reabsorption in the DCT and collecting ducts, by increasing the sodium reabsorption. Hyposecretion of vasopressin prevents water absorption in the collecting ducts, which results in secretion of dilute urine.

Aldosterone increases sodium reabsorption in the DCT and collecting ducts, thereby increasing water reabsorption via osmosis. Therefore, increase in aldosterone results in concentrated urine.

Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to sugar levels in the blood.

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