EXCRETORY SYSTEM
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The pituitary gland stops secreting ADH
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The walls of the collecting duct become less permeable to water
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Large volumes of dilute urine are produced
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More aquaporins are inserted in the cells of the collecting duct
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Detailed explanation-1: -This hormone triggers chemical reactions that ultimately insert aquaporin 2 water channels into the membrane of collecting duct cells. These channels allow water to be reabsorbed into the bloodstream, which makes the urine more concentrated. When fluid intake is adequate, less ADH is produced.
Detailed explanation-2: -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-3: -The antidiuretic hormone arginine vasopressin (AVP) increases collecting duct water permeability by enhancing aquaporin-2 (AQP2) water channel insertion in the apical membrane of principal cells, allowing water to passively flow along the osmotic gradient from the tubule lumen to the interstitium.
Detailed explanation-4: -you would suffer severe dehydration. Aquaporins are like water channels for the cell.