Which of the following is most closely associated with a MAC attack?
A. Complement proteins D. Histamine
B. Helper T cells E. Cytokinins
C. B cells
A
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A patient is infected with a bacteria that is resistant to erythromycin (the antibiotic is not effective) and sensitive to clindamycin (the antibiotic is effective). However, the patient is not improving and the organism now appears to be resistant to both antibiotics. The reason for this alteration in gene expression in the bacterium is likely due to:
a. genetic regulation that encodes the resis-tance mechanism is constitutive. b. the genetic regulation encoding the en-hanced resistance is inducible. c. the genetic regulation for the enhanced resistance is normally suppressed. d. the organism was always resistant to both antibiotics and should not have been treated with the combination therapy.
An artery has a much thicker muscle layer than
a. a vein b. a capillary c. a venule d. all of the above
Enteric hepatitis is fatal for 20% of people in which of the following groups?
A) infants under the age of 1 year B) teenagers C) young adults D) pregnant women E) elderly men
The (constant/end/variable) regions from the light and heavy chains of an antibody combine to form antigen-binding sites
What will be an ideal response?