Ulcers are caused when stomach acid comes in contact with the stomach wall. What keeps the stomach acid away from the stomach wall under normal circumstances?

Question

anonymous · Answer

The enzymes secreted into the chyme from the stomach walls
		The mucus coating secreted by the epithelial cells of the stomach
		The saliva that is swallowed along with the chewed food
		The sodium bicarbonate secreted into the stomach by the pancreas

anonymous · Answer

The mucus coating secreted by the epithelial cells of the stomach keeps acid from damaging the stomach walls.