EXCRETORY SYSTEM
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If you are over-hydrated (high water potential in the blood), the body must excrete excess water. To do so, the brain triggers the pituitary gland to ____
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release MORE ADH, making the collecting duct MORE permeable
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release LESS ADH, making the collecting duct LESS permeable
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release MORE ADH, making the collecting duct LESS permeable
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release LESS ADH, making the collecting duct MORE permeable
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Explanation:
Detailed explanation-1: -ADH is released by the pituitary gland when the blood is too concentrated and it causes the kidney tubules to become more permeable . This allows more water to be reabsorbed back into the blood during selective reabsorption.
Detailed explanation-2: -Dehydration causes the hypothalamus to release ADH (antidiuretic hormone) via the posterior pituitary gland. The ADH signal tells the kidneys to recover water from urine, which dilutes the blood plasma.
Detailed explanation-3: -A high ADH level causes the body to produce less urine. A low level results in greater urine production. Normally, the amount of ADH in the body is higher during the night. This helps prevent urination while you are sleeping.
There is 1 question to complete.