A 1-year-old child with cystic fibrosis would demonstrate elevated levels of which of these compounds in both sweat and salivary gland secretions?
A) Potassium
B) Sodium chloride
C) Magnesium
D) Carbonic acid

Question

Quizplus · Accepted Answer

Cystic fibrosis causes abnormal transport of chloride ions, leading to elevated levels of sodium chloride in both sweat and salivary gland secretions. This is a hallmark diagnostic feature of the disease. Potassium, magnesium, and carbonic acid levels would not be affected by cystic fibrosis in this way.

A 1-Year-Old Child with Cystic Fibrosis Would Demonstrate Elevated Levels