________ are a component of the immune system that are able to destroy cancer cells by deploying toxins into infected cells as a means of killing them. In this role they are cytotoxic—that is, "cell killing."
A) Natural killer cells
B) Phagocytes
C) Antibodies
D) B cells
Answer: A
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The contractile unit of a skeletal muscle fiber
is a(an) ___.
a. myofibril b. sarcomere c. myosin filament d. actin filament e. Z line
A __________ (fungus-root) is a symbiotic interaction between a fungus and a plant. Fill in the blank(s) with the appropriate word(s)
Most drugs that inhibit the synthesis of the cell wall act by
A) preventing the cross-linkage of NAM subunits. B) blocking the secretion of cell wall molecules from the cytoplasm. C) preventing the formation of alanine-alanine bridges. D) disrupting the formation of the mycolic acid layer of the cell wall. E) preventing the formation of ?-lactamases.
The objective, measurable evidence of disease evaluated by an observer is termed
A. pathology. B. inflammation. C. syndrome. D. sign. E. symptom.