1) Most common and least severe type of skin cancer; often characterized by light or pearly nodules. a) malignant melanoma b) herpes simplex I c) miliaria rubra d) basal cell carcinoma 2) An allergy to an ingredient or a chemical, usually caused by repeated skin contact with the ingredient. a) hyperhidrosis b) allergic contact dermatitis c) seborrheic dermatitis d) vitiligo 3) Cannot survive in the presence of oxygen. a) anaerobic b) excoriation c) allergic d) aerobic 4) Unstable molecules that cause biochemical aging, especially wrinkling and sagging of the skin. a) lentigines b) free radicals c) intrinsic factors d) extrinsic factors 5) An inflammation of the skin caused by having contact with certain chemicals or substances. a) hypopigmentation b) rosacea c) contact dermatitis d) psoriasis 6) Primarily environmental factors that contribute to aging and the appearance of aging. a) extrinsic factors b) free radicals c) lentigines d) intrinsic factors 7) Occurs when irritating substances temporarily damage the epidermis. a) allergic contact dermatitis b) irritant contact dermatitis c) conjuncivitis d) basal cell carcinoma 8) The hereditary tendency for acne-prone skin to retain dead cells in the follicle, forming an obstruction that clogs follicles. a) impetigo b) hyperhidrosis c) retention hyperkeratosis d) albinism 9) Skin-aging factors over which we have little control. a) extrinsic factors b) free radicals c) lentigines d) intrinsic factors 10) Most serious form of skin cancer; often characterized by black or dark brown patches on the skin that may appear uneven in texture, jagged, or raised. a) squamous cell carcinoma b) basal cell carcinoma c) malignant melanoma d) tumor 11) Product that has been designed and proven not to clog the follicles. a) noncomedogenic b) keratoma c) anaerobic d) cicatrix 12) Also known as a wart; hypertrophy of the papillae and epidermis. a) verruca b) wheal c) vesicle d) tubercle 13) Allergic reaction created by repeated exposure to a chemical or substance. a) dermatitis b) sensitization c) excoriation d) hypopigmentation 14) Type of skin cancer more serious than basal cell carcinoma; often characteized by scaly red papules or nodules. a) telangiectasis b) malignant melanoma c) eczema d) squamous cell carcinoma

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