Changes in the osmolarity of the extracellular fluid are detected by osmoreceptors in the hypothalamus.

Question

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Osmoreceptors in the hypothalamus are sensitive to changes in osmolarity of the extracellular fluid and play a key role in regulating water balance through the secretion of anti-diuretic hormone (ADH). These receptors can sense either an increase or decrease in osmolarity, which triggers the release of ADH or inhibits its secretion, respectively.

Changes in the Osmolarity of the Extracellular Fluid Are Detected