Endocrinology/VasopressinADH/ControlToSweating/basic

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2020年2月8日 (土) 00:16時点におけるAdmin (トーク | 投稿記録)による版
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POINT!
SweatingBeforeBasicFeedbackToADH-Eng.jpg

① Sweating increases plasma osmolarity (becomes concentrated, hypertonic), and reabsorption (through the water channels, which are increased by vasopressin, ADH) decreases plasma osmolarity. These effects are in the opposite direction (blue).

SweatingDuringBasicFeedbackToADH-Eng.jpg

② Since these effects are in the opposite direction (blue), negative feedback increases (red) (the synthesis, secretion, and blood concentration of) vasopressin (anti-diuretic hormone, ADH). This increases the number of water channels and the reabsorption of water. The plasma osmolarity-decreasing effect of the reabsorption increases. This will lead to a reverse in the increased plasma osmolarity (concentrated, hypertonic plasma) produced by sweating, decreasing it towards normal (baseline, isotonic) osmolarity.

Challenge Quiz

1.

Sweating increases decreases plasma osmolarity, and reabsorption (through the water channels, which are increased by vasopressin, ADH) increases decreases plasma osmolarity. Since these effects are in the same opposite direction, negative feedback increases decreases (the synthesis, secretion, and blood concentration of) vasopressin (anti-diuretic hormone, ADH).