Why does exposure to sunlight or sunlamps darken skin?
A) UV radiation stimulates melanocytes to produce more melanin.
B) UV radiation stimulates melanocytes to produce more melatonin.
C) UV radiation stimulates keratinocytes to produce more carotene.
D) UV radiation stimulates keratinocytes to produce more keratin.
E) UV radiation stimulates melanocytes to produce more melanin and keratinocytes to produce more keratin.
Answer: A
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a) albuminuria b) glucosuria c) urobilinogenuria d) ketonuria e) bilirubinuria
The primary function of the cardiovascular system is ________.
Fill in the blank(s) with the appropriate word(s).
What is the function of GnRH?
A. To cause a release of LH B. To cause a release of TSH C. To cause a release of ACTH D. To cause a release of GH
The human immunodeficiency virus (HIV) targets mainly ________.
A. B cells B. helper T cells C. cytotoxic T cells D. plasma cells E. natural killer cells