Which of the following cells is NOT an APC?
A) dentritic cells
B) macrophages
C) mature B cells
D) natural killer cells
E) None of the answers is correct; all of these are APCs.
D
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Some plants gain their nutrition by parasitizing other plants
A. true B. false
During the first major divergence of life the
atmosphere was a. high oxygen, high carbon dioxide. b. high hydrogen, low oxygen. c. changing from anaerobic to aerobic. d. firmly in the age of aerobes. e. all of these.
How does aspirin act to decrease the symptoms of inflammation?
A. it acts as an anti-prostaglandin. B. it is an anti-toxoid for most microbial toxins. C. it prevents complement activation. D. it interferes with the action of interferons. E. it blocks the release of histamine.
Discuss the purpose and level of control achieved by pasteurization. Compare the flash and batch methods.
What will be an ideal response?