Cytotoxic T cells
A. produce antibodies for general circulation.
B. attach to the surface of cells causing them to lyse.
C. cause precipitation of antigens.
D. have IgG antibodies on their cell membranes.
E. are destroyed after contact killing.
B
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Which of the following is an effect of stress on the immune system?
a) Increased activity of T lymphocytes b) Increased activity of B lymphocytes c) Activation of the immune system d) Inhibition of the immune system e) Increased production of antibodies
A receptor potential is
A) the resting membrane potential of a receptor cell. B) an action potential. C) a graded potential. D) always converted to an action potential in sensory receptor cells.
The lipid portion of a cell's plasma membrane constitutes a barrier to current.
Answer the following statement true (T) or false (F)
_____ are the major targets of growth hormone.
Fill in the blank(s) with the appropriate word(s).