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Le mucus gastrique – Barrière<br />
Gradient de pH<br />
muqueuse<br />
pH=2<br />
pH=4<br />
pH=7<br />
Suc gastrique dégradation<br />
Couche de mucus<br />
HCO3-<br />
Cellules sécrétant le mucus<br />
HCO3
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