Why does hair turn white or gray with age?
A) The hair is no longer producing carotene.
B) The keratinocytes have been damaged.
C) Sebaceous gland activity increases, making the hair well lubricated during growth and turning it white or gray.
D) The epidermis is dividing faster, making the hair white or gray.
E) The melanocyte activity declines, making the hair white or gray.
Answer: E
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The hand has ________ bones in the wrist and ________ bones in the palm
A) 5; 5 B) 10; 5 C) 8; 4 D) 8; 5 E) 4; 5
Within the axilla, axons of neurons are organized within
A. three cordsâ€"the posterior, medial, and lateral cords. B. three divisionsâ€"the superior, middle, and inferior divisions. C. five cordsâ€"the superior, inferior, medial, lateral, and middle divisions. D. five divisionsâ€"proximal, distal, ulnar, median, and radial divisions.
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