Question

Which of the following is an example of positive feedback in the lumen of the stomach?

- Chief cells secrete pepsinogen, which is a precursor to pepsin.
- Pepsin digests molecules of pepsinogen, producing more pepsin.
- Pepsin works best in the acidic environment produced by hydrochloric acid.
- Hydrochloric acid converts pepsinogen to pepsin.

Answer 1

The answer to this question is hydrochloric acid converts pepsinogen to pepsin!

Step-by-step explanation:

All the other answers just don't make sense!