A 36-year-old man who has traveled for several weeks in the orient is experiencing abdominal pain and diarrhea with a large amount of mucus. A H. heterophyes egg measuring 28 by 15 µm is identified in the stool. The treatment of choice for this intestinal trematode is:
a. metronidazole.
b. chloroquine.
c. albendazole.
d. praziquantel.
D
The drug of choice for treatment of this intestinal trematode infection caused by H. heterophyes is praziquantel (Biltricide), an isoquinoline derivative administered orally in three doses for 1 day. Some mild side effects may develop, but these usually disappear within 48 hours and may be more severe in those with heavy infections. An alternative drug is niclosamide (Niclocide), which is administered for 1 to 2 days.
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Science is subdivided into specific areas of study termed disciplines. These divisions are artificial but are helpful to narrow the massive scope of scientific knowledge to a manageable amount. Given what you know about each, which scientific division is likely to present the best answer to a question about how fluid dynamics affect blood pressure in mammals?
A. Bioinformatics – use of technology to study and store biological data B. Biochemistry – study of chemical reactions needed for life function, usually at the cellular level. C. Biology – study of life D. Biophysics – study of biological processes through physics
Four of the five answers listed below are related by their participation in water movement through plants. Select the exception
a. hydrogen bonds b. transpiration c. cohesion d. tension e. phytoremediation
Which of the following components was NOT
a significant part of the earth's early atmosphere?
a. carbon dioxide b. water vapor c. nitrogen gas d. oxygen gas e. hydrogen gas
A homozygous recessive where “A” represents the
trait has two recessive alleles __________. Fill in the blank(s) with the appropriate word(s).