The attraction of additional macrophages and their release of mediators of inflammation is due to:
A. the original macrophage releasing compounds to attract additional macrophages
B. the presence of antibodies to the original hapten
C. the hapten being engulfed and processed by Th1 cells
D. release of cytokines from Th1 cells
Answer: D. release of cytokines from Th1 cells
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Influenza A virus can be identified by which of the following surface glycoproteins?
A) HA B) NA C) both HA and NA D) M protein
A. Ecological function
A. Yeast cells suck in air when trapped in dough. B. Carbon dioxide is produced during fermentation. C. Multiplication of yeast physically expands the dough. D. The fungal cells burst causes the dough to expand.
Microscopic reproductive cells produced by most fungi are
A. hyphae. B. fruiting bodies. C. spores. D. gills. E. mycelium.
Which of the following is mismatched?
a. oligotrophic lake; high productivity b. cool water; high gas content c. eutrophic lake; pollution d. eutrophic lake; succession e. eutrophic lake; oxygen depletion