Choose the Correct Answer from the List Below

Choose the correct answer from the list below. Not all of the answers will be used.
-____________ is the mechanism by which the stomach maintains a pH of around 1-2 pH units.

A) ATP-dependent proton pump
B) G-protein
C) hydrolyzed
D) pepsin
E) digestion
F) zymogen
G) lipases
H) hydrolysates
I) carbohydrates
J) lipids
K) micelle
L) ERK pathway