ob, a 49-year-old house painter, arrives for his appointment with Mary, his dental hygienist, to have his teeth cleaned----the first time in three years. Mary takes a complete health and dental history. She makes note of the fact that Bob smokes approximately two packs of cigarettes a day, occasional cigars at parties, and drinks two or three beers daily after working in the hot sun. He is concerned about the appearance of his lips and teeth. Mary carefully observes his face and lips for any abnormal moles or lesions, noticing that Bob has a deep tan and that the left side of his lower lip is raised, firm, and scaly. The lesion is about 9 mm in diameter. Bob tells her that his lip has had that appearance for about a year. Mary also notes that Bob’s skin is quite wrinkled for one his age. What are the 2 pigments that determine the color of skin? OTHER THAN heredity/genetics, name 3 other variables that produce differences in skin color. What physiological mechanism causes the skin to tan in the sun?
Bob, a 49-year-old house painter, arrives for his appointment with Mary, his dental hygienist, to have his teeth cleaned----the first time in three years. Mary takes a complete health and dental history. She makes note of the fact that Bob smokes approximately two packs of cigarettes a day, occasional cigars at parties, and drinks two or three beers daily after working in the hot sun. He is concerned about the appearance of his lips and teeth.
Mary carefully observes his face and lips for any abnormal moles or lesions, noticing that Bob has a deep tan and that the left side of his lower lip is raised, firm, and scaly. The lesion is about 9 mm in diameter. Bob tells her that his lip has had that appearance for about a year. Mary also notes that Bob’s skin is quite wrinkled for one his age.
- What are the 2 pigments that determine the color of skin?
- OTHER THAN heredity/genetics, name 3 other variables that produce differences in skin color.
- What physiological mechanism causes the skin to tan in the sun?
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