Page 176 - The Cell in 40 Topics

The Cell in 40 Topics

bonate molecules to the region, which molecules neutralize the stomach acid
and protect the duodenum.
How do have processes, of such vital importance to human beings,

come about? Intestinal cells know that the substance they need is to be found

Figures 141 and 142.
When the acid level in the duodenum rises to dangerous levels, bicarbonate
molecules go into action by way of the hormone secretin, to neutralize the
stomach acid.

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