EXCRETORY SYSTEM
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When you are dehydrated what out of the following options will happen? [3]
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Less ADH will be secreted by the pituitary.
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More water will be reabsorbed back into the blood.
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Osmoreceptors in the hypothalamus will detect increased blood concentration.
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The volume of urine will increase.
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More ADH will be secreted by the pituitary.
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Explanation:
Detailed explanation-1: -Antidiuretic hormone (ADH) is a chemical produced in the brain that causes the kidneys to release less water, decreasing the amount of urine produced. A high ADH level causes the body to produce less urine. A low level results in greater urine production.
Detailed explanation-2: -If water is in excess, ADH levels are reduced limiting the amount of water resorbed back into the blood but increasing the volume eliminated in the urine. If you drink a pint or so of fluid you will notice that within an hour your urine volume will increase and the excess water will therefore be eliminated.
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