Term
| The skin is made of three layers, what are they? |
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Definition
| epidermis, dermis, and subcutaneous layer. |
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Term
| The Epidermis contains 4 types of cells, what are they? |
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Definition
| keratinocytes, melanocytes, langerhan cells, and merkel cells. |
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Term
| Keratinocytes, which make up 90% of epidermal cells do what for skin? |
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Definition
| Protects skin and underlying tissues from heat, microbes, and chemicals. These cells also produce lamellar granules, which release a water-repellent sealant. |
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Term
| Melanocytes, which are mainly in the stratum basale, make what for skin? |
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Definition
| Melanin, a yellow to brown to blackpigment that contributes to skin color, is made by melanocytes. |
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Term
| Langerhan Cells, which arise from red bone marrow, migrate where? and do what? |
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Definition
| to the epidermis, and participate in immune responses againts microbes that invade skin. |
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Term
| Merkel Cells, which are the least numerous of epidermal cells, are located where? and do what? |
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Definition
| merkel cells are located in the deepest layer of the epidermis. They detect certain aspects of touch. |
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Term
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Definition
| Deepest layer of epidermis, single layer of cells in contact with dermis, also called sratum germinativum, to indicate its role in forming new cells. |
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Term
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Definition
| superficial to stratum basale, provides strength and flexibility. |
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Term
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Definition
| 3-4 rows of flattened cells. formation of water-repellent between cells. |
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Term
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Definition
| only present on fingertips, palms and soles. thick skin. |
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Term
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Definition
| 25-30 layers of dead kerotinocytes, true skin protector. |
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Term
| Papillary and Reticular layers make up what? |
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Definition
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Term
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Definition
| projections called dermal papillae, pain receptors, and capillary loops. |
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Term
| The corpuscles of touch or meissner corpuscles are what? |
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Definition
| nerve endings that are sensitive to touch |
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Term
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Definition
| attached to subcutaneous layer, contains blood vessels and nerves, and glands. |
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Term
| integumentary effectors consist of muscles or glands within ? and does what? |
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Definition
| the dermis, and responds to motor impulses transmitted from cns to skin. |
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Term
| Name three things about thin skin that is different from thick skin. |
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Definition
| covers remaining part of body, no stratum lucidium, dermal papillae-fewer and broader, lacks epidermal ridges, hair follicle, errector pili muscles, sebaceous glands, fewer sweat glands. |
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Term
| what are the three skin color determinants? |
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Definition
| melanin, carotene, and hemoglobin. |
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Term
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Definition
| superficial portion of hair, which projects above surface of skin. |
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Term
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Definition
| portion of the hair deep to the shaft that penetrates into the dermis, and sometimes into the subcutaneous layer. |
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Term
| the shaft and root both consists of three layers, what are they? |
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Definition
| medulla, cortex, and cuticle of the hair. |
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Term
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Definition
| contains areolar connective tissue and many blood vessels that nourish the growing hair follicle. |
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Term
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Definition
| secrete sebum that helps the hair from drying and becoming brittle. prevents excessive evaporation of water from skin |
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Term
| sudoriferous or sweat glands are divided into two main types, what are they? |
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Definition
| eccrine and apocrin sweat glands. |
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Term
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Definition
| open via duct to pore on skin surface |
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Term
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Definition
| begins to function at puberty and located mainly in axilla, groun, areolae, male bears |
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