Which of the following statements is TRUE? Alpha interferon promotes phagocytosis. Alpha interferon acts against specific viruses. Gamma interferon promotes attack by macrophages. Beta interferon attacks invading viruses. All three types of interferons have the same effect on the body.
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Which of the following is not correct concerning interferon? a. Interferon is a protective protein. b. Virus-infected cells produce interferon. c. Interferon has no effect on viruses. d. Interferon can be used to treat certain viral infections.
Which of the following statements about phagocytosis is false? a) Phagocytes move toward an area of infection by chemotaxis. b) Digestion of invaders occurs within a phagolysosome. c) Phagocytes have receptors that recognize $C 3 b$ bound to bacteria. d) Phagocytes have receptors that recognize antibodies bound to bacteria. e) Macrophages die after phagocytizing bacteria, but neutrophils regenerate their lysosomes and survive.
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