Digestion and Absorption in the Stomach

Proteins are only partially digested in the stomach by the action of pepsin, while carbohydrates and fats are not digested at all by pepsin. (Digestion of starch begins in the mouth with the action of salivary amylase and continues for a time when the food enters the stomach, but amylase soon becomes inactivated by the strong acidity of gastric juice.) The complete digestion of food molecules occurs later, when chyme enters the small intestine.

Therefore, people who have had partial gastric resections—and even those who have had complete gastrectomies—can still adequately digest and absorb their food.

Almost all of the products of digestion are absorbed through the wall of the small intestine; the only commonly ingested substances that can be absorbed across the stomach wall are alcohol and aspirin. Absorption occurs as a result of the lipid solubility of these molecules. The passage of aspirin through the gastric mucosa has been shown to cause bleeding, which may be significant if aspirin is taken in large doses.

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Essentials of Human Physiology

Essentials of Human Physiology

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  • Susanne
    Is aspirin able to be absorbed across the stomach wall?
    8 years ago
  • sandra
    What commonly ingested substances are absorbed through the stomach wall?
    8 years ago
  • Marina
    What commonly ingested substance are absorbed through the stomach wall?
    8 years ago
  • susanna pisani
    What commonly ingested substsnces are absorbed tgrough yhe dtomach wsll?
    8 years ago
  • miika
    What substances are ingested but not digested?
    7 years ago
  • tuija
    What are the only molecules absorbed through the stomach?
    6 years ago
  • roderic
    What absorption occurs in the stomach in physiology?
    6 years ago
  • kai
    Why is alcohol absorbed in the stomach walls?
    3 years ago
    What substance is absorved in the stomack?
    2 years ago
  • chiaffredo
    Why stomach absorbs alcohol,aspirin?
    2 years ago
  • Quarantino Siciliani
    2 years ago
    What is substance that absorb in stomach?
    2 years ago
  • mathilda
    Can proteins be absorbed through the stomach wall?
    1 year ago
  • andreas
    Does flexerol get absorbed in the stomach?
    1 year ago
  • mateusz johnston
    What kind of substances are absorbed by gastric mucossa?
    1 year ago
  • Frank
    Which food substance is absorbed in the stomach.?
    1 year ago
  • elizabeth
    How rotariq absorb in stomach?
    12 months ago
  • belba
    Which molecule is not able to be absorbed across the stomach wall?
    11 months ago
  • giacinta
    Can stomach wall absorb aspirin?
    11 months ago
  • cornelia
    What substanecs are absrobed by stomach?
    10 months ago
  • orazio
    Does absorption start in the stomach?
    8 months ago
  • bisirat fesahaye
    Is amylase and alcohol absorbed by stomache?
    8 months ago
  • Bingo
    How does aspirin cross the stomach wall?
    8 months ago
  • kaiju
    How is digestion in the stomach dual innervation?
    7 months ago
  • aliisa
    What is the effect of some alcohol being absorbed in the stomach?
    6 months ago
  • antonino
    Which substances can the stomach absorb?
    6 months ago
  • Jai
    Where does the absorption of aspirin occur?
    5 months ago
  • cassio
    What materials are absorbed in the stomach lining?
    5 months ago
  • steffen
    What molecules get across the gut wall?
    5 months ago
    Is anyhting absorbed across the human stomach lining?
    5 months ago
  • Helen
    What substances does the stomach digest?
    4 months ago
  • joey
    Why does aspirin absorption occur in the stomach?
    4 months ago
  • ANKE
    Is water absorbed through the stomach wall?
    3 months ago
  • azzurra
    What substances are absorbed thru the stomach lining?
    3 months ago
  • ponto
    Which substances can be absorbed in the small intestine?
    3 months ago
  • milo roper
    Is aspirin digested in stomach or intestine?
    2 months ago
  • Morven Watson
    Where are things absorbed in th gut?
    1 month ago
  • Saare
    What role does absorption have on the stomach?
    1 month ago
  • bertoldo
    What 4 things can your stomach absorb?
    27 days ago
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    Is there anything you can take that will help with absorption of medicine in your stomach?
    20 days ago
  • Ilmari
    Where does the absorption of nutrients in the stomach occurs?
    6 days ago
  • teuvo
    What things absorbed in stomach?
    5 days ago

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