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202
do does the regulatory process work at the osmotic homeostasis?
what does it result in? 4
what does it result in? 4
-Vasopressin (VP, antidiuretic hormone, ADH) secretion by magnocellular neurones of supraoptic nucleus (SON) & paraventricular nucleus of the hypothalamus (PVN)
-Specific stimulus (increase osmolality body fluid) increase secretion into blood stream;
-Circulating VP acts VP receptors (V2) kidney and
increase water permeability distal convoluted tubules (DCT) nephrons by insertion water channels into apical membrane tubular epithelial cells
- Increase water permeability collecting duct (CD)
Result
-Antidiuresis (conserve water)
-Movement water DCT & CD by OSMOSIS
-Decrease urine flow
-increase urine osmolality
-Specific stimulus (increase osmolality body fluid) increase secretion into blood stream;
-Circulating VP acts VP receptors (V2) kidney and
increase water permeability distal convoluted tubules (DCT) nephrons by insertion water channels into apical membrane tubular epithelial cells
- Increase water permeability collecting duct (CD)
Result
-Antidiuresis (conserve water)
-Movement water DCT & CD by OSMOSIS
-Decrease urine flow
-increase urine osmolality
