What is the significance of the infective body formed by Coxiella bacteria, intracellular parasites that cause a zoonosis in humans?
A) It uses actin filaments to move from cell to cell.
B) It is a resistant stage similar to an endospore.
C) It can grow in extracellular fluid for short periods of time.
D) It is only produced when Coxiella is in a tick.
E) It is a fragile stage found only inside cells.
B
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Which of the following is a function performed by potassium in plants?
a. synthesizing nucleic acids and phospholipids b. converting light into chemical energy in photosynthesis c. regulating the opening and closing of stomata d. regulating nutrient transportation
The complement system can be activated by
A) inflammatory mediators. B) antigen-antibody complexes. C) B cell plasma membrane. D) T cells.
A contact lens wearer and cat owner begins to experience problems with her eye. The eye is inflamed and painful, and examination of the eye reveals that the conjunctiva is ulcerating. Which of the following parasites is most likely responsible?
A. Acanthamoeba B. Cryptosporidium parvum C. Entamoeba histolytica D. Toxoplasma gondii E. Trypanosoma cruzi
The most versatile and useful antifungal drug that is used to treat serious systemic fungal infections is
A) Griseofulvin B) Nystatin C) Sulfa drugs D) Amphotericin B E) Metronidazole