osmoreceptor


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osmoreceptor

 [oz″mo-re-sep´tor]
1. any of a group of specialized neurons of the supraoptic nuclei of the thalamus that are stimulated by increased extracellular fluid osmolality to cause the release of antidiuretic hormone (ADH) from the posterior pituitary.

os·mo·re·cep·tor

(oz'mō-rē-sep'tŏr, -tōr),
1. A receptor in the central nervous system (probably the hypothalamus) that responds to changes in the osmotic pressure of the blood.
2. A receptor that receives olfactory stimuli.
Synonym(s): osmoceptor

osmoreceptor

/os·mo·re·cep·tor/ (oz″mo-re-sep´ter)
1. any of a group of specialized neurons in the hypothalamus that are stimulated by increased osmolality (chiefly, increased sodium concentration) of the extracellular fluid; their excitation promotes the release of antidiuretic hormone by the posterior pituitary.

osmoreceptor

[-risep′tər]
Etymology: Gk, ōsmos, impulse; L, recipere, to receive
1 a neuron in the hypothalamus that is sensitive to the relative fluid/solute concentration in the blood plasma and that regulates the secretion of antidiuretic hormone.
2 a receptor of smell stimuli.

os·mo·re·cep·tor

(oz'mō-rē-sep'tŏr)
1. A receptor in the central nervous system (probably the hypothalamus) that responds to changes in the osmotic pressure of the blood.
2. A receptor that receives olfactory stimuli.
[G. osmos, impulsion]

osmoreceptor

any of the group of structures sited in the HYPOTHALAMUS that respond to changes in osmotic pressure of the blood by means of neurohypophyseal antidiuretic hormone.

osmoreceptor

central nervous system receptor responding to changes in osmotic pressure of blood

osmoreceptor

1. a specialized sensory nerve ending sensitive to stimulation giving rise to the sensation of odors.
2. any of a group of specialized neurons of the supraoptic nuclei of the thalamus that are stimulated by increased extracellular fluid osmolality to cause the release of antidiuretic hormone (ADH) from the posterior pituitary.
References in periodicals archive ?
Osmoreceptors in the hypothalamus are sensitive to overall fluid balance and release ADH accordingly.
When body water is lost, osmoreceptors in the hypothalamus sense an increased body fluid osmolarity and stimulate the secretion of AVP.
Osmoreceptors in the hypothalamus itself cause the pituitary to increase ADH levels when plasma osmolality increases as little as 1-2% [2,7] Baroreceptors, especially in the heart and the carotid sinus, [10] monitor changes in blood volume and pressure and indirectly signal the hypothalamus to regulate ADH according to perceived changes.