In systemic lupus erythematosus
A. a delayed lymphocyte response causes severe diarrhea.
B. IgD levels are high while IgG levels are low.
C. antibodies target the individual's own body.
D. antibody levels are abnormally low.
Answer: C
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Which of the following is NOT a property of enzymes?
a) Enzymes are catalytic proteins. b) Enzymes are highly specific. c) Enzymes are efficient. d) Enzymes are subject to a variety of cellular controls. e) Enzymes are irreversibly changed by the reactions that they catalyze.
In an adult, which of the following bones would be producing the largest number of blood cells?
A. Tibia B. Sternum C. Ulna D. Calcaneus E. Metacarpals
When you swallow food, why does it NOT usually enter the respiratory system?
A. The Heimlich maneuver prevents it from doing so. B. The bronchioles produce mucus. C. The diaphragm contracts. D. The epiglottis covers the opening to the respiratory system. E. The vocal cords block the opening to the respiratory system.
Mature molecules of tropocollagen are found in the:
a. Cisternae of the rough endoplasmic reticulum of a fibroblast b. Extracellular environment of a fibroblast c. Golgi apparatus of a plasma cell d. Secretory vesicles of a fibroblast e. Smooth endoplasmic reticulum of a macrophage