The complement system consists of several proteins that form a(n) ________ that forms a pore in the membrane of bacteria during the nonspecific immune response.
A) membrane attack complex
B) endogenous pyrogen
C) perforin
D) acute phase complex
E) cell-mediated antigen
Answer: A) membrane attack complex
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Which type of cell provides metabolic support to the neurons?
a. Muscle b. Neuroglia c. Loose connective d. Squamous e. Dense connective
One generalization of the cell theory is that
a. all cells have a nucleus. b. all cells have cell walls. c. the cell is the smallest unit that displays the properties of life. d. cells can arise from nonliving matter. e. all cells are microscopic.
The theory illustrated by Figure 21-1 is used to explain the origin of:
a. anaerobes. b. prokaryotes. c. eukaryotes. d. vascular plants. e. protobionts
Which of the following statements about malaria is false?
A. Sporozoites are only found within a mosquito. B. Gametocytes are passed to a feeding mosquito. C. Merozoites are found inside red blood cells. D. Fertilization occurs within a mosquito. E. Gametocytes develop from merozoites.