Freckles are the result of
A. melanocyte number and genetic inheritance.
B. melanocyte number and sun exposure.
C. melanocyte activity, genetic inheritance, and sun exposure.
D. melanocyte number, genetic inheritance, and diet.
E. melanocyte activity and diet.
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Question 2) Blood capillaries that supply nourishment for the epidermis are located in the
A. dermal papillae.
B. epidermal ridges.
C. reticular connective tissue.
D. epidermis proper.
E. subcutaneous layer.
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Question 3) The reticular layer of the dermis consists primarily of
A. adipose tissue.
B. reticular connective tissue.
C. dense irregular connective tissue.
D. nervous tissue.
E. elastic connective tissue.
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Question 4) Which skin markings usually disappear during childhood?
A. Friction ridges
B. Capillary hemangiomas
C. Cavernous hemangiomas
D. Pili
E. Nevi
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Question 5) Within the body, carotene is converted to
A. vitamin A, which is important for auditory function.
B. vitamin E, which is important for auditory function
C. vitamin E, which is important for visual function.
D. vitamin A, which is important for visual function.
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Question 6) Generally, people have ________ number of melanocytes ______________.
A. about the same; no matter where they live
B. a highly variable; irrespective of where they live
C. a lower; if they live in colder climates of the northern hemisphere
D. a higher; if they live in the warmer climates near the equator
E. a higher; if they live in the southern hemisphere
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Question 7) Normally, skin color results from a combination of
a: melanin
b: hemoglobin
c: bilirubin
d: carotene
A. a, b, d
B. a, c, d
C. a, d
D. a, b, c
E. b, c, d
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Question 8) The process of keratinization begins in the stratum granulosum.
Indicate whether this statement is true or false.
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Question 9) The function of melanin in the skin is to
A. reduce water loss.
B. prevent infections.
C. help regulate body temperature.
D. protect against UV light.
E. keep the epidermis soft and pliable.
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Question 10) Thick skin contains
A. seven epidermal strata and lacks sweat glands.
B. five epidermal strata and lacks sweat glands.
C. four epidermal strata and lacks sebaceous glands.
D. six epidermal strata and lacks sweat glands.
E. five epidermal strata and lacks sebaceous glands.
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