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Gastrointestinal Physiology pp 53–80Cite as

Gastrointestinal Secretion: Aids in Digestion and Absorption

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Abstract

This chapter begins by describing oral secretion of saliva and its functions including the dilution and buffering of foods and the digestion of starches and lipids. Food then progresses to the stomach where hydrochloric acid (HCl) is produced and pepsinogen and intrinsic factor are secreted. In the small intestine the reader learns to delineate the factors involved in the production of pancreatic exocrine secretions and their role in the digestion and absorption of carbohydrates, proteins, lipids, and the aqueous secretion of sodium, bicarbonate, and water. Additionally the role of biliary secretion in the digestion and absorption of lipids is defined. Finally the role of intestinal secretion in normal conditions versus abnormal conditions (e.g., diarrhea and hyperchloremic metabolic acidosis) is considered.

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Suggested Reading

  • Barrett KE. Gastric secretion (Chapter 50). In: Raff H, Levitzky I, editors. Medical physiology: a systems approach. New York: McGraw Hill; 2011.

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  • Hall JE. Secretory functions of the alimentary tract (Chapter 64). In: Hall JE, editor. Guyton and Hall textbook of medical physiology. Philadelphia: Saunders Elsevier; 2011.

    Google Scholar 

  • Janson LW, Tischler ME. The digestive system (Chapter 11). In: The big picture: medical biochemistry. New York: McGraw Hill; 2012. p. 149–66.

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  • Johnson LR. Salivary secretion (Chapter 7). In: Gastrointestinal physiology. 8th ed. Philadelphia: Elsevier-Mosby; 2014a. p. 54–63.

    Google Scholar 

  • Johnson LR. Pancreatic secretion (Chapter 9). In: Gastrointestinal physiology. 8th ed. Philadelphia: Elsevier-Mosby; 2014b. p. 82–93.

    Google Scholar 

  • Johnson LR. Bile secretion and gallbladder function (Chapter 10). In: Gastrointestinal physiology. 8th ed. Philadelphia: Elsevier-Mosby; 2014c. p. 94–107.

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Authors and Affiliations

  1. Department of Internal Medicine, The University of Arizona, Tucson, AZ, USA

    Eugene Trowers MD, MPH

  2. Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, USA

    Marc Tischler BA, MS, PhD

Authors
  1. Eugene Trowers MD, MPH
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  2. Marc Tischler BA, MS, PhD
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© 2014 Springer International Publishing Switzerland

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Trowers, E., Tischler, M. (2014). Gastrointestinal Secretion: Aids in Digestion and Absorption. In: Gastrointestinal Physiology. Springer, Cham. https://doi.org/10.1007/978-3-319-07164-0_4

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  • DOI: https://doi.org/10.1007/978-3-319-07164-0_4

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-07163-3

  • Online ISBN: 978-3-319-07164-0

  • eBook Packages: MedicineMedicine (R0)

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