ANATOMY 328 Lecture Notes - Lecture 32: Photoaging, Elastin, Shingles
Document Summary
Somatosensation: receptive fields, tonic receptor response, phasic receptor response, tactile receptors, unencapsulated tactile receptors, free nerve endings, root hair plexuses, tactile (merkel) disc, encapsulated tactile receptors. Lamellated (pascinian) corpuscles: bulbous (ruffini) corpuscles, tactile (meissner) corpuscles, dermatomes. Li(cid:374)es of clea(cid:448)age (cid:894)la(cid:374)ger"s lines: flexure lines. Waterproof the skin (protection) desmosomes hold these together. All layers; many dead ones on the stratum corneum. Produce melanin (pigmentation that protects against uv radiation) give keratinocytes melanin (in fair-skinned people, lysosomes digest the melanin) Stratum spinosum and basale (more so in the basale) Take up foreign bodies and bring them to lymph nodes. Layers of the epidermis: thick sin, covers palms and soles, has 5 layers or strata, thin skin, covers the rest of the body, 4 layers/strata present, 1. Stratum spinosum: keratinocytes and dendritic cells, dendritic cells are part of immune response travel to lymph node after endocytosis and initiate immune response, 3.
