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ADN 2 CH 55 (GLOSSARY)

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Question
Answer
alopecia:   loss of hair from any cause  
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dermatosis:   any abnormal skin condition  
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erythema:   redness of the skin caused by congestion of the capillaries  
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hirsutism:   the condition of having excessive hair growth  
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hyperpigmentation:   increase in the melanin of the skin, resulting in an increase in pigmentation  
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hypopigmentation:   decrease in the melanin of the skin, resulting in a loss of pigmentation  
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keratin:   an insoluble, fibrous protein that forms the outer layer of skin  
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Langerhans cells:   dendritic clear cells in the epidermis that carry surface receptors for immunoglobulin and complement and that are active participants in delayed hypersensitivity of the skin  
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melanin:   the substance responsible for coloration of the skin  
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melanocytes:   cells of the skin that produce melanin  
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Merkel cells:   cells of the epidermis that play a role in transmission of sensory messages  
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petechiae:   pinpoint red spots that appear on the skin as a result of blood leakage into the skin  
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rete ridges:   undulations and furrows that appear at the dermis–epidermis junction and are responsible for cementing together the two layers  
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sebaceous glands:   glands that exist within the epidermis and secrete sebum to keep the skin soft and pliable  
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sebum:   fatty secretion of the sebaceous glands  
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telangiectases:   red marks on the skin caused by distention of the superficial blood vessels  
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vitiligo:   a localized or widespread condition characterized by destruction of the melanocytes in circumscribed areas of the skin, resulting in white patches  
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Wood’s light:   a blue light used for diagnosing skin conditions  
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