06-10-2015, 12:06 PM
Gastric fluid samples from a healthy volunteer are taken 30 minutes before and 30 minutes after ingestion of white bread. A marked increase in the concentration of H+ ions is observed. Which of the following is essential to the development of this increase?
A. Active transport of Na+ ions into the gastric lumen
B. Passive transport of Cl- ions into the gastric lumen
C. Active transport of K+ ions into the gastric lumen
D. Passive transport of K+ ions into the gastric lumen
E. Active transport of Cl- ions into parietal cells
A. Active transport of Na+ ions into the gastric lumen
B. Passive transport of Cl- ions into the gastric lumen
C. Active transport of K+ ions into the gastric lumen
D. Passive transport of K+ ions into the gastric lumen
E. Active transport of Cl- ions into parietal cells