Histamine, leukotrienes, prostaglandins, and bradykinin are examples of which of the following?
A) chemical mediators primarily found in the digestive system
B) chemical mediators that promote inflammation
C) antimicrobial peptides found on the skin
D) complement proteins that form MACs
Answer: B) chemical mediators that promote inflammation
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Darwin's observations led to his proposal that evolution occurred due to
a. random chance. b. climatic changes. c. natural selection. d. migration. e. interaction of species.
Which of the following is part of the apoplast?
A. Cell wall B. Plasma membrane C. Plasmodesma D. Cytoplasm
The bacterium Thermus aquaticus is to polymerase chain reaction (PCR) as __________ is to __________.
a. penicillin mold; curing bacterial infections in humans b. Streptococcus pyogenes; HIV c. mitochondria; protists d. non-pathogenic bacteria; disease e. conjugation; transduction
All of the following are true regarding African trypanosomiasis EXCEPT
A) it is also known as "sleeping sickness." B) all subspecies of Trypanosoma brucei have multiple hosts. C) it is transmitted by the tsetse fly. D) death ultimately occurs without proper treatment. E) Trypanosoma brucei gambiense is the more common cause of disease.