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Pacinian corpuscles are also found on bone periosteum, joint capsules, the pancreas and other internal organs, the breast, genitals, [4] and lymph nodes. [5] Pacinian corpuscles are rapidly adapting mechanoreceptors. As phasic receptors they respond quickly but briefly to a stimulus with the response diminishing even when the stimulus is ...
Red arrows indicate secreted lamellar bodies, and green arrows indicate lamellar bodies in the cytoplasm. Scale bar = 200 nm. In cell biology, lamellar bodies (otherwise known as lamellar granules, membrane-coating granules (MCGs), keratinosomes or Odland bodies) are secretory organelles found in type II alveolar cells in the lungs, and in keratinocytes in the skin.
The Pacinian corpuscle or Vater-Pacinian corpuscles or Lamellar corpuscles [5] in the skin and fascia detect rapid vibrations of about 200–300 Hz. [3] [6] They also produce transient responses, but have large receptive fields. Free nerve endings detect touch, pressure, stretching, as well as the tickle and itch sensations. Itch sensations are ...
Lamellar bodies are tubular or ovoid-shaped secretory organelles derived from the Golgi apparatus of keratinocytes in the upper part of stratum spinosum. [16] From the site of production, lamellar bodies migrate to the top of the stratum granulosum and then into the intercellular domain of the stratum corneum to extrude their contents, which ...
Corneal corpuscles appearing fusiform in section; Lamellae, the fibers of which are cut longitudinally; Transition to the sclera, with more distinct fibrillation, and surmounted by a thicker epithelium; Small blood vessels cut across near the margin of the cornea
Lamellar microtubules: They are the microtubules that eventually wrap around the axon, forming the myelin sheath. Actin-based : These include terminal foot processes of podocytes and dendritic spines (small protrusions arising from dendrites).
A lamella (pl.: lamellae) in biology refers to a thin layer, membrane or plate of tissue. [1] This is a very broad definition, and can refer to many different structures. Any thin layer of organic tissue can be called a lamella and there is a wide array of functions an individual layer can serve.
Merkel nerve endings are extremely sensitive to tissue displacement, and may respond to displacements of less than 1 μm. A mechanoreceptor's receptive field is the area within which a stimulus can excite the cell. If the skin is touched in two separate points within a single receptive field, the person will be unable to feel the two separate ...