The chemical mediator that causes prolonged bronchospasm, vascular permeability, and mucus secretion of asthmatic patients is ________.
A. platelet-activating factor
B. prostaglandin
C. histamine
D. leukotriene
E. serotonin
Answer: D
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Which of the following properties is likely to be found in a pioneer colonizer of a biofilm on an artificial joint implant?
A. The ability to grow at thermophilic body temperature,(37ºC) B. Surface structures for attaching to tissue C. No susceptibility to reactive oxygen species like peroxides D. The ability to use the titanium from the implant as an energy source
In the flowering plant life cycle, into what
strucures do microspores directly develop?
a. male gametophytes b. megaspores c. sperm d. zygotes e. male sporophytes
Semi-enclosed areas of the coastal ocean where seawater is diluted and partially mixed with freshwater coming from the land are referred to as
A) eddies. B) coastal reservoirs. C) tidal basins. D) estuaries.
To research health conditions on your own, what source is best?
Internet sites selling products to help improve your health An Internet forum where someone with no scientific or medical training writes an article Articles found in medical literature All of the above