Which of the following hair colors is the result of a decrease in melanin?
A. red
B. white
C. brown
D. auburn
E. black
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Question 2) When the arrector pili muscles contract
A. the body is able to lose heat.
B. no change is noted on the skin surface.
C. the hair on your arms and legs begins to curl.
D. the sweat glands empty their contents onto the surface of the skin.
E. goose bumps form on the skin.
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Question 3) Lead poisoning can be detected by doing an analysis of
A. sweat.
B. skin folds.
C. hair.
D. skin.
E. nails.
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Question 4) Bob was completely bald on the top of his head by the time he was 35 years of age. Bob noticed he produced abundant sweat on his head when he exercised. He also noticed that his scalp was no longer oily.
Which of the following changes account for the observations?
(1) He has fewer functional hair follicles now.
(2) He has fewer functional sebaceous glands now.
(3) He has fewer merocrine sweat glands now.
(4) He has fewer apocrine sweat glands now.
A. 1, 3, 4
B. 1, 2, 3, 4
C. 1, 2
D. 1, 2, 4
E. 1, 2, 3
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Question 5) That portion of the hair that extends above the surface of the skin is the
A. cuticle.
B. hair bulb.
C. root.
D. medulla.
E. shaft.
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Question 6) The portion of the hair below the surface of the skin is the
A. medulla.
B. shaft.
C. cuticle.
D. root.
E. hair bulb.
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Question 7) The outer surface of the hair is called the
A. medulla.
B. shaft.
C. hair bulb.
D. cuticle.
E. root.
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Question 8) An expanded knob at the base of the hair root is the
A. medulla.
B. cuticle.
C. hair bulb.
D. root.
E. shaft.
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Question 9) The central axis of the hair is the
A. shaft.
B. cuticle.
C. root.
D. medulla.
E. hair bulb.
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Question 10) The length of hair is determined by the
A. size of the hair bulb.
B. age of the person.
C. length of the resting stage.
D. angle of the hair root.
E. rate of hair growth.
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