A patient is diagnosed with a severe intestinal disease caused by E. histolytica. Which of the following treatments should be administered?
a. Diloxanide furoate
b. Metronidazole
c. Metronidazole plus iodoquinol
d. Iodoquinol and diloxanide furoate
C
In severe intestinal disease caused by E. histolytica, metronidazole plus one of the luminal drugs (e.g., iodoquinol, diloxanide furoate) should be used for therapy.
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Most known plant viruses have ________-strand RNA genomes, because small genomes ________
A) negative / facilitate cell-to-cell transfer B) positive / facilitate cell-to-cell transfer C) negative / interact more readily with host DNA D) positive / interact more readily with host DNA
What is NOT a reason that the kidneys are particularly prone to damage caused by immune complexes?
A. Kidney blood vessel wall cells have receptors for antibodies on them, which makes them soak up antibodies (or in this case, immune complexes) from the bloodstream. This blocks the kidneys up and causes them to malfunction and become damaged. B. Blood is pushed through the kidneys at a very high pressure-any blockage of the vessels (such as what might be caused by immune complex deposits) can lead to ruptures/inflammation and damage. C. While blood vessel walls do NOT have receptors for antibodies, large immune complexes forced through small diameter vessels can become embedded within them. This can trigger complement system inflammation and cell destruction. D. Trapped immune complexes that initiate inflammation can attract neutrophils. The neutrophils degranulate in the area of the immune complexes, leading to cell/tissue destruction.
What is meant by the description "antiparallel" regarding the strands that make up DNA?
A) The twisting nature of DNA creates nonparallel strands. B) The 5' to 3' direction of one strand runs counter to the to direction of the other strand. C) Base pairings create unequal spacing between the two DNA strands. D) One strand contains only purines and the other contains only pyrimidines.
__________ behavior is altered by experience.
Fill in the blank(s) with the appropriate word(s).