ANIMAL PHYSIOLOGY
OSMOREGULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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Detailed explanation-1: -If the concentration of water in the blood is too high, then water can move into cells by OSMOSIS. They can burst if too much water moves into them (lysis).
Detailed explanation-2: -ADH molecules bind to receptor proteins, activating a signalling cascade that leads to the phosphorylation of the aquaporin molecules. This activates the aquaporins, causing the vesicles to fuse with the luminal membranes of the collecting duct cells. This increases the permeability of the membrane to water.
Detailed explanation-3: -ADH travels in the bloodstream to its target organ, the kidneys. It causes the kidney tubules to become more permeable . This means more water can leave the kidney tubule to be reabsorbed back into the blood during selective reabsorption.
Detailed explanation-4: -ADH regulates and balances the amount of water in the blood. Higher water concentration will increase the volume and pressure exerted in the blood. The ADH controls osmoregulation in the human kidney. An increase in osmolality causes the secretion of ADH.