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baroreceptor

baroreceptor

1 9.8
A nerve ending that senses changes in blood pressure
  • noun
  • /ˌbɛəroʊrɪˈsɛptər/
  • Specialized
: barorreceptor
  • If the baroreceptor senses high blood pressure, it will trigger mechanisms to lower it.
  • baroreceptor reflex
  • baroreceptor activation
  • impaired baroreceptor

Examples

  • When blood pressure drops, the baroreceptor sends signals to the brain to increase heart rate.

  • The baroreceptor helps regulate blood pressure by detecting changes in the stretch of blood vessels.

  • DIAGRAM: Fig 3 -- Neuronal pathways of the baroreceptor reflex.

    Academic text (1991)
  • The afferent and central portions of the baroreceptor reflex arc, however, function normally during syncope, and vasopressin is secreted.

    Academic text (1991)
  • If so, plasma concentration of endothelin-1 (referred to as endothelin in this article) would be expected to change with activation of the baroreceptor reflex.

    Academic text (1991)
  • Because specific inhibitors of endothelin action are not yet available, the physiological function of the endothelin released into plasma during baroreceptor activation remains to be defined.

    Academic text (1991)
  • Since plasma endothelin concentration increases with upright posture and decreases with volume expansion, a study was conducted to test whether activation of the baroreceptor reflex releases endothelin into plasma.

    Academic text (1991)
  • The abrupt return to the horizontal position would have augmented venous return, eliciting an immediate Starling effect with subsequent increases in blood pressure and activation of the baroreceptor reflex to decrease heart rate.

    Academic text (2000)

Surface Forms

baroreceptor singular
baroreceptors plural

Morphology

baroreceptor = receptor (semi-transparent) = baro + receptor

The word is compositionally 'baro-' (pressure) + 'receptor', which is clear in scientific contexts, but the combining form 'baro-' is not familiar to general B1 learners.

Etymology

Baroreceptor comes from baro- meaning 'pressure', like barometer, and receptor meaning 'one who receives' or 'receiver'. So a baroreceptor is a body sensor that 'receives' changes in blood 'pressure' and helps the body keep blood pressure steady.