Tubular reabsorption in response to ADH is referred to as ______.Multiple choice question.facultative water reabsorptionobligatory water reabsorption
Question
Tubular reabsorption in response to ADH is referred to as ______.
- facultative water reabsorption
- obligatory water reabsorption
Solution
The answer is "facultative water reabsorption". This is because ADH (Antidiuretic hormone) increases the permeability of the distal convoluted tubule and collecting duct, which allows for water to be reabsorbed back into the body. This process is not always active, but is instead triggered by ADH in response to certain stimuli - hence it is 'facultative'. Obligatory water reabsorption, on the other hand, refers to the water reabsorption that occurs in the proximal convoluted tubule and descending limb of the loop of Henle, which is not under hormonal control.
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