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Gastrointestinal Function
This chapter discusses the functions of gastrointestinal tract. The principal functions of the gastrointestinal tract are assimilation of nutrients and excretion of the waste products of digestion. Within the gastrointestinal tract, these substances are solubilized and degraded enzymatically to simp...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
1980
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7271190/ http://dx.doi.org/10.1016/B978-0-12-396350-5.50013-9 |
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author | TENNANT, BUD C. HORNBUCKLE, WILLIAM E. |
author_facet | TENNANT, BUD C. HORNBUCKLE, WILLIAM E. |
author_sort | TENNANT, BUD C. |
collection | PubMed |
description | This chapter discusses the functions of gastrointestinal tract. The principal functions of the gastrointestinal tract are assimilation of nutrients and excretion of the waste products of digestion. Within the gastrointestinal tract, these substances are solubilized and degraded enzymatically to simple molecules, sufficiently small in size and in a form that permits absorption across the mucosal epithelium. The distribution of the different types of secretory cells in the salivary glands varies among species. The mandibular and sublingual glands are mixed salivary glands containing both mucous and serous types of cells, and produce a viscous secretion that contains large amounts of mucus. The cytoplasm of the secretory cells contains numerous zymogen granules that vary in size and number depending on the activity of the gland. These granules contain the precursors of the hydrolytic enzymes responsible for digestion of the major dietary components. The cells of the terminal ducts probably secrete the bicarbonate ion responsible for neutralizing hydrochloric acid that enters the duodenum from the stomach. |
format | Online Article Text |
id | pubmed-7271190 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1980 |
record_format | MEDLINE/PubMed |
spelling | pubmed-72711902020-06-05 Gastrointestinal Function TENNANT, BUD C. HORNBUCKLE, WILLIAM E. Clinical Biochemistry of Domestic Animals Article This chapter discusses the functions of gastrointestinal tract. The principal functions of the gastrointestinal tract are assimilation of nutrients and excretion of the waste products of digestion. Within the gastrointestinal tract, these substances are solubilized and degraded enzymatically to simple molecules, sufficiently small in size and in a form that permits absorption across the mucosal epithelium. The distribution of the different types of secretory cells in the salivary glands varies among species. The mandibular and sublingual glands are mixed salivary glands containing both mucous and serous types of cells, and produce a viscous secretion that contains large amounts of mucus. The cytoplasm of the secretory cells contains numerous zymogen granules that vary in size and number depending on the activity of the gland. These granules contain the precursors of the hydrolytic enzymes responsible for digestion of the major dietary components. The cells of the terminal ducts probably secrete the bicarbonate ion responsible for neutralizing hydrochloric acid that enters the duodenum from the stomach. 1980 2014-06-27 /pmc/articles/PMC7271190/ http://dx.doi.org/10.1016/B978-0-12-396350-5.50013-9 Text en Copyright © 1980 ACADEMIC PRESS, INC. Published by Elsevier Inc. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active. |
spellingShingle | Article TENNANT, BUD C. HORNBUCKLE, WILLIAM E. Gastrointestinal Function |
title | Gastrointestinal Function |
title_full | Gastrointestinal Function |
title_fullStr | Gastrointestinal Function |
title_full_unstemmed | Gastrointestinal Function |
title_short | Gastrointestinal Function |
title_sort | gastrointestinal function |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7271190/ http://dx.doi.org/10.1016/B978-0-12-396350-5.50013-9 |
work_keys_str_mv | AT tennantbudc gastrointestinalfunction AT hornbucklewilliame gastrointestinalfunction |