MEDICAL
URINARY BLADDER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the oral mucosa is dry
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the osmolality of the blood increases
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blood pressure decreases
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all of the above
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Detailed explanation-1: -(A) The most potent hormonal stimulus for thirst is angiotensin II (AngII), which is generated when the rate-limiting enzyme renin is secreted by the kidneys in response to hypovolemia or hypotension.
Detailed explanation-2: -If your body doesn’t produce enough ADH or your kidneys don’t respond to it, your body loses too much water in urine output. Signs of low ADH include: Excessive thirst. Frequent urination.
Detailed explanation-3: -Subtle changes in plasma osmolality are the most potent stimulus for thirst. In response to increases in osmolality, osmoreceptors activate release of the neurohormone vasopressin (also known as antidiuretic hormone).
Detailed explanation-4: -Chronic underproduction of ADH or a mutation in the ADH receptor results in diabetes insipidus. If the posterior pituitary does not release enough ADH, water cannot be retained by the kidneys and is lost as urine. This causes increased thirst, but water taken in is lost again and must be continually consumed.