Chapter 3 Physiology and Histology of the Skin 12th edition Standard esthetics Latest Updated

Chapter 3 Physiology and Histology of the Skin 12th edition Standard esthetics Latest Updated Apocrine glands - CORRECT ANSWER-Coiled structures attached to hair follicles found in the underarm and genital areas that secrete sweat. Arrector pili muscle - CORRECT ANSWER-The small, involuntary muscle in the base of the hair follicle that causes goose bumps when the appendage contracts; sometimes called paoillae. Barrier function - CORRECT ANSWER-Protective barrier of the epidermis; the corneum and intercellular matrix protect the surface from irritation and dehydration. Bilayers - CORRECT ANSWER-A thin polar membrane made of two layers of lipid molecules; these membranes are flat sheets that form a continuous barrier around all cells. Ceramides - CORRECT ANSWER-Glycolipid materials that are a natural part of skin's intercellular matrix and barrier function. Collagen - CORRECT ANSWER-Fibrous, connective tissue made from protein; found in the reticular layer of the dermis; gives skin its firmness. Topically, a large, long-chain molecular protein that lies on the top of the skin and binds water; derived from the placentas of cows or other sources. Couperose - CORRECT ANSWER-Redness; capillaries that have been damaged and are now larger, or distended, blood vessels; Commonly seen with telangiectasia. Corneocytes - CORRECT ANSWER-Another name for a stratum corneum cell. Hardened, waterproof, protective keratinocytes; these "dead" protein cells are dried out and lack nuclei. Dermal Papillae - CORRECT ANSWER-Membranes of ridges and grooves that attach to the epidermis; contains nerve endings and supplies nourishment through capillaries to skin and follicles. Dermis - CORRECT ANSWER-Also known as derma, corium, cutis, or true skin; support layer of connective tissue, collagen, and elastin below the epidermis. Desmosomes - CORRECT ANSWER-The structures that assist in holding cells together; intercellular connections made of proteins.