Which cells of the immune system are the primary targets the HIV virus?
a) B cells
b) helper T cells
c) cytotoxic T cells
d) antigen-presenting cells
e) all of these cells are affected by HIV
b
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A muscle fiber is
A. synonymous with a muscle cell. B. an elongated series of muscles held together by dense connective tissue. C. a collection of several muscles bound together by a membrane. D. found only in cardiac muscle. E. unable to transmit a signal from one fiber to another.
Which part of the clavicle articulates with the manubrium?
a) A b) B c) C d) D e) None of these choices are correct.
Universal precautions are
A) rules used to avoid mismatched blood types in transfusions. B) specific measures that health-care workers should take to prevent transmission of bloodborne pathogens in the workplace. C) the careful administration of clotting factors to stop bleeding during surgery. D) specific measures that astronauts take in space to avoid leaving microorganisms beyond the Earth.
Which of the following is a disaccharide?
A. Lactose B. Amylose C. Fructose D. Glucose E. Galactose