ANIMAL PHYSIOLOGY
EXCRETION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Detailed explanation-1: -When the water potential is low (so the blood has a high solute concentration), these osmoreceptor cells lose water by osmosis and shrink, causing the release of a peptide hormone called ADH (vasopressin/anti-diruretic hormone). ADH passes to the posterior pituitary gland and is secreted into the capillaries.
Detailed explanation-2: -Higher concentrations of anti-diuretic hormone cause blood vessels to constrict (become narrower) and this increases blood pressure. A deficiency of body fluid (dehydration) can only be finally restored by increasing water intake.
Detailed explanation-3: -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. But if the levels of ADH remain low during the night, the body will produce large amounts of urine, so urination during the night is more likely.
Detailed explanation-4: -Antidiuretic hormone (ADH) helps regulate the amount of water in your body. It works to control the amount of water your kidneys reabsorb as they filter out waste from your blood. This hormone is also called arginine vasopressin (AVP).