ANIMAL PHYSIOLOGY
EXCRETION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As tissue osmolarity rises, more ADH is released, causing less water to be excreted as urine.
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As tissue osmolarity rises, less ADH is released, causing less water to be excreted as urine.
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As tissue osmolarity rises, more ADH is released, causing more water to be excreted as urine.
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As tissue osmolarity rises, less ADH is released, causing more water to be excreted as urine.
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Detailed explanation-1: -Antidiuretic hormone (ADH) is important in maintaining homeostasis in mammals. ADH is released from the hypothalamus in response to high tissue osmolarity. In response to ADH, the collecting duct and distal tubule in the kidney become more permeable to water, which increases water reabsorption into the capillaries.
Detailed explanation-2: -High ADH increases reabsorption of water and produces a low volume of highly concentrated urine; low ADH is associated with a high volume of highly dilute urine. Lowered osmolarity decreases ADH secretion, causing loss of water over salt in the kidney and the blood osmolarity returns toward normal.
Detailed explanation-3: -Antidiuretic hormone (ADH, or vasopressin): ADH helps regulate the water balance in your body by controlling the amount of water your kidneys reabsorb while they’re filtering wastes out of your blood.
Detailed explanation-4: -Anti-diuretic hormone acts to maintain blood pressure, blood volume and tissue water content by controlling the amount of water and hence the concentration of urine excreted by the kidney.
Detailed explanation-5: -ADH is stored in neurons within the hypothalamus. These neurons express osmoreceptors that are exquisitely responsive to blood osmolarity and respond to changes as little as two mOsm/L. [2] Therefore, slight elevations in osmolarity result in the secretion of ADH.