Your patient has a normal helper T cell count, but very little helper T cell activity. Which of the following scenarios may explain this observation?
A. She is HIV positive.
B. She has a mutation in her MHC II proteins making them ineffective.
C. She has a mutation in the gene for perforin and makes an ineffective version of this molecule.
D. She has low antibody activity.
E. None of these answers would explain the observations seen in this patient.
Answer: B
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A fluid secreted into the small intestine during digestion that contains cholesterol, emulsification agents, and phospholipids is ________.
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What is required for filtration to occur?
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A pH of 5.5 would be considered
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