Day 9 Notes Key - sciovirtual.org Receptors Meissner\u2019s corpuscles \u25cf Located in the dermal papillae of glabrous(smooth hairless skin \u25cf 3 main

Day 9 Notes Key - sciovirtual.org Receptors...

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sciovirtual.org Receptors Meissner’s corpuscles Located in the dermal papillae of glabrous (smooth hairless) skin 3 main portions: lamellae of schwann cells, central axon, and connective tissue capsule Schwann cells are located in an interlamellar matrix made out of collagen fibers + microfilaments Function: Fast adapting Merkel Disc 2 main components: merkel cell + afferent neuron Slow adapting Senses light pressure, static discrimination between different textures, shapes “Attached” to a sensory neuron, where the merkel cell releases serotonin in order to stimulate an action potential Has microvilli Lobed nuclei Ruffini corpuscles Aka bulbous corpuscle Usually located in reticular dermis Enlarged dendritic endings Slow adapting Detects skin stretch, High density around fingernails Pacinian corpuscles Aka lamellated corpuscles Contains a lot of lamellae (concentric layers) Capsule of the corpuscle acts like a filter in order to only allow short wavelengths

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