TLS Online TPP Program

#Question id: 12042


A 19-year-old woman visits her physician because of nausea, diarrhea, light headedness, and flatulence. The physician administers 50 g of oral lactose at time zero, and measures breath hydrogen every 30 min for 3 hr using a hand-held monitor. The results are shown above. Which of the following best describes this patient’s condition?


#Unit 7. System Physiology – Animal
  1. Brush border lactase deficiency
  2. Brush border lactase excess
  3. Decreased pancreatic lactase
  4. Increased pancreatic lactase