deanna06
Terms
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- cells that produce keratin
- Keratinocytes
- fibrous protein that allows skin to have protective effect
- Keratin
- Melanocytes
- Spider-shaped cell produce melanin protects form UV rays
- Merkel Cells
- Spiked-shaped, important for touch
- Star-shaped, help activate immune system
- Langerhan Cell
- Thick skin 5 layers
- Stratum Basale Stratum Corneum Stratum Granulosum Stratum Spinosum Stratum Lucidum
- Thin skin 4 layers
- Cover the rest of body except soles of feet and hands
- Stratum Basale
- Lower layer, melanocytes & Merkel cells
- Stratum Corneum
- Upper layer, dead cells
- Below Corneum Above Spinosum
- Stratum Granulosum
- Stratum Spinosum
- Layer above basale Langerhan cells &keratinocytes
- 2 layers of Dermis
- Papillary Reticular
- Skin color
- Melanin-yellow Carotene-yellow to orange Hemoglobin-pinkish
- Sebaceous (oil) gland
- Oily substance sebum empties into hair to soften and reduce water loss
- Sweat Glands 2 types
- Eccrine-coiled below surface Apocrine: Larger, secretes into hair
- Chemical Barriers
- Melanin-prevents UV skin cancer Acid pH-Low pH skin excretion Sebum-Bacterial substance Human Defensin-natural antibiotic Cathelicidins-streptococcus bacteria prevention
- what creates hardness of skin?
- Keratin
- Prevention of water loss and water penetration is called?
- Glycolipids
- Substance that can penetrate the skin are?
- Lipid-soluble substances-oxygen,CO2 Oleoresins-posion ivy/oak Organic solvents-acetone salts of heavy metals-lead,Ni, Hg Drug agents