Answer the following questions true (T) or false (F)
1. Pleurisy is the accumulation of pus in the lungs.
2. Klebsiella pneumoniae is a leading cause of HAP infections.
3. Macrophages effectively phagocytize and kill Mycobacterium tuberculosis.
1. FALSE
2. TRUE
3. FALSE
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Select the most complete explanation of what the pH scale measures.
A. The acidity of a solvent B. The alkalinity of a solvent C. The concentration of buffers in a solution D. The concentration of hydrogen ions in a solution
The critical hurdle with measuring treatment effects is that:
A. our subjects cannot be both untreated and treated at the same time. B. it's always equal to the effect of the treatment on the treated. C. it's hard to have a truly random treatment assignment. D. we have selection bias.
Silvadene, a topical treatment for burns, contains 1% silver. What category of chemical control agent is in Silvadene?
A) halogens B) heavy metals C) oxidizing agents D) aldehydes E) surfactants
Alligators excavate holes in the bottom of bodies of water. During times of severe drought these holes act as refugia for various aquatic organisms that might perish if there were no water available. Thus, alligators in this system can be classified as a(n)
A. allopatric species. B. symbiotic species. C. sympatric species. D. keystone species. E. refugistic species.