Which of the following statements regarding phagocytosis is TRUE?
A. Phagocytosis is controlled by a negative feedback mechanism whereby phagocytes release chemicals that inhibit further phagocytosis.
B. Antibodies found inside lysosomes attack and kill microbes that are engulfed by phagocytosis.
C. The microbe engulfed by the phagocyte is killed by lysosomal enzymes and hydrogen peroxide.
D. Macrophages are the only phagocytes in human tissues.
E. The microbe engulfed by the phagocyte is killed by the membrane attack complex (MAC).
Answer: C
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A) left atrium. B) left ventricle. C) right atrium. D) right ventricle. E) conus arteriosus.
The time period of the embryo is two weeks gestation to ________.
Fill in the blank(s) with the appropriate word(s).
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