Nursing 247 Exam 2 Prep Questions and Complete Solutions
Skin Largest organ in the body Guards against environment stresses, adapts to environmental influences. Has 2 layers epidermis and dermis Epidermis Thin, but tough. Completely replaced every 4 weeks Avascular. Cells (dead) are bound together to make protective sheets. Basal cell layer forms new skin cells like Keratin, Melanocytes (color), and Horny cell layer (dead cell layer) Dermis Inner supportive layer made up of Collagen. Resilient elastic tissue. Contains nerves, sensory receptors, blood vessels and lymphatics. Also hair follicles, sebaceous glands, sweat glands Subcutaneous layer adipose tissue (temperature and cushioning) Hair made of keratin Sebaceous glands produce sebum (protective for hair follicles and skin) Sweat glands Regulates temperature. Eccrine and apocrine (in adolescents) Nails hard plates of keratin Protection Prevents penetration Perception Temperature regulation Identification Communication Wound repair Absorption and excretion Production of vitamin D What are the functions of the skin? Lanugo Hair on body of an infant that will fall out Vernix caseosa dead skin cells in uterus w/ baby for protection Milia white pustules on nose that go away
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- 22 de julio de 2024
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