receptor

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GI tract distension and stasis: GI, particularly duodenal, distension triggers stretch receptors in the gut wall, stimulating vagal afferent pathways to the CPG.
6-8] In normal breathing after a particular degree of stretching or even before this, stretch receptors in alveoli are stimulated and send information to the respiratory centers so that exhalation sets in.
Our findings that more patients in whom pencil-point spinal needles are inserted either respond to or acknowledge having experienced sensation at the moment of thecal penetration provides strong clinical evidence that the lumbar meninges are well supplied with sensory stretch receptors.
Failure of blood pressure sensors in the arteries or stretch receptors in the stomach (which alert other parts of the body that eating is under way) can lead to postprandial hypotension.