The human immunodeficiency virus (HIV) that causes the disease known as AIDS selectively infects ________, which leads to clinical problems.
A) B cells
B) plasma cells
C) cytotoxic T cells
D) helper T cells
E) suppressor T cells
D) helper T cells
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Which are the least numerous of the leukocytes?
A. Eosinophils B. Basophils C. Monocytes D. Lymphocytes E. Neutrophils
________ proteins extend all the way across the cell membrane.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a function of lipids?
A) They provide cushioning around soft organs. B) They form the structure of some hormones. C) They form the plasma membrane structure. D) They form myelin around nerve fibers. E) They form skeletal muscle fibers.
In whom are mammary glands found?
A. In lactating females B. In lactating and non-lactating females C. In non-lactating females and males D. In non-lactating females