NUR 218 Exam 2 Purdue Prep Questions and Complete Solutions

What is the largest organ in the body? skin, covers over 20 square feet of surface area what are the two layers the skin? epidermis and dermis what is under the dermis? a subcutaneous layer composed of adipose tissue, allows for temperature control and cushioning epidermis thin but tough, inner basal cell layer is what FORMS NEW CELLS (cells migrate from basal cell layer to top of skin where they schleff off) horny cell layer consists of dead keratinized cells that are interwoven and tightly packed, cells are constantly being shed here How often is the epidermis completely replaced? every 4 weeks Dermis inner supportive layer composed mainly of collagen, nerves, sensory receptors, blood vessels and lymphatics live here Collagen structural protein found in the skin and connective tissue hair threads of keratin vellus hair pale, fine body hair of children and adult females terminal hair Darker, thicker hair that grows on the scalp and eyebrows and, after puberty, on the axillae, the pubic area, and the face and chest in the male. eccrine sweat glands Secreting glands, are far more numerous and are abundant on palms, soles of feet and forehead. Each is a simple, coiled, tubular gland. Ducts connect to pores. Sweat: 99% water, NaCl, vitamin C, antibodies, dermcidin and metabolic wastes. apocrine glands Sweat glands in the pubic and underarm areas that secrete thicker sweat, that produce odor when come in contact with bacteria on the skin nail plate Hardened keratin plate that sits on and covers the natural nail bed. It is the most visible and functional part of the natural nail unit.