What is the main target organ affected by the hyposecretion of antidiuretic hormone (ADH) in diabetes insipidus?
Liver.
Kidneys.
Pancreas.
Heart.
The Correct Answer is B
The kidneys are the main target organ affected by the hyposecretion of antidiuretic hormone (ADH) in diabetes insipidus. ADH normally acts on the kidneys to promote water reabsorption and concentrate urine. In diabetes insipidus, the lack of ADH results in excessive urine production and dilute urine.
Incorrect choices:
a. This choice is incorrect. The liver is not the primary target organ affected by ADH in diabetes insipidus.
c. This choice is incorrect. The pancreas is not the primary target organ affected by ADH in diabetes insipidus.
d. This choice is incorrect. The heart is not the primary target organ affected by ADH in diabetes insipidus.
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Related Questions
Correct Answer is B
Explanation
In diabetes insipidus, the inability to concentrate urine leads to diluted urine with low osmolality. An elevated urine osmolality is indicative of the inability to properly conserve water.
Incorrect choices:
a. This choice is incorrect. Low blood glucose levels are not characteristic of diabetes insipidus.
c. This choice is incorrect. Hypernatremia, or elevated sodium levels, can result from excessive fluid loss in diabetes insipidus, but it is not a direct diagnostic indicator.
d. This choice is incorrect. High urine glucose levels are indicative of diabetes mellitus, not diabetes insipidus.
Correct Answer is D
Explanation
The desmopressin stimulation test measures the response of the kidneys to synthetic ADH (desmopressin) and is used to differentiate between central and nephrogenic diabetes insipidus.
Incorrect choices:
a. This choice is incorrect. The glucose tolerance test is used to diagnose diabetes mellitus, not diabetes insipidus.
b. This choice is incorrect. A serum electrolyte panel provides information about electrolyte levels but is not specific to diabetes insipidus diagnosis.
c. This choice is incorrect. The water deprivation test, not the desmopressin stimulation test, is used to diagnose diabetes insipidus and assess the ability of the kidneys to concentrate urine.
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