A 7-month-old presents with cystic fibrosis (CF) accompanied by failure to thrive and frequent, loose, and oily stools. Sweat testing confirms the diagnosis. Which of the following is character-istic of CF?
a. Autoantibodies that target the lungs and pancreas
b. Thick mucous sputum
c. Enzymes that degrade surfactant in the alveoli
d. A toxic amount of electrolytes from se-cretory glands
ANS: B
In CF, thick mucus is present. CF is not characterized by autoantibodies, degraded surfactant, or elevated electrolytes.
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