Concept:The stomach secretes hydrochloric acid, making its contents strongly acidic.
Explanation:The stomach contains gastric juice with hydrochloric acid.
This gives the stomach a low
pH value, usually between
1.5 and
3.5.
This acidic environment helps digest proteins and kill ingested bacteria.
Other regions of the human gut, such as the duodenum, ileum, and colon, are not normally acidic.
In fact, the duodenum is made alkaline by bile and pancreatic juice.
Answer:A. stomach