20. What is the pH inside the
stomach? Why is there a need
to keep that pH level? How is
it maintained? Which are the
cells that produce that pH?

Gap-fill exercise

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The normal pH the gastricjuice is
2. So it an acid pH.

is necessaryfor the be
kept acid the activation of
(a proenzyme secreted
the gastric chief ) into pepsin, the
enzyme that acts under
low pH. pH level is by the
secretion hydrochloric acid (HCl)
the parietal cells.