A 33-year-old female presents with eyes that have been red and irritated for the past month. Discharge from the eyes is not apparent. She also has a recurrent low-grade fever and a rash on her chest and legs. Her joints have been achy for the past few months, and her mouth has been so dry it is often difficult to swallow food. Antinuclear antibody testing is performed, and a speckled pattern is observed on HEp-2 cells. Which follow-up test result would you expect for this patient?
A.) Positive ANCA
B.) Presence of anti-SS-A or anti-SS-B
C.) Decreased rheumatoid factor
D.) Presence of antibody to dsDNA
Answer: B.) Presence of anti-SS-A or anti-SS-B
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The cells in the gastric glands that produce digestive substances are the:a
goblet and pyloric cells. b. alpha and beta cells. c. pyloric and parietal cells. d. chief and goblet cells. e. parietal and chief cells.
A scientist that constructs a hypothesis and then tests its validity by outlining predicted events of the hypothesis followed by experiments to test for those events is using the ________ approach.
A. inductive B. trial-and-error C. deductive D. instructive
Which of the structural classes of MHC proteins has two subunits?
a. MHC I only b. MHC II only c. both MHC I and MHC II d. none
Which is true regarding genomes of Archaea?
a. Archaeal genomes are generally larger than those of Bacteria. b. Unlike Bacteria, Archaea do not show a strong correlation between genome size and ORF content. c. Archaea have fewer genes for carbohydrate metabolism, transport, and membrane biosynthesis. d. Archaea have fewer genes for energy and coenzyme production.