The function of the gastrointestinal tract (GI tract) is to process food. During this process, food is moved from the mouth to the anus. Feeding and drinking are voluntary activities, but are strongly influenced by signals from higher brain centers involved in the sensations of satiety and thirst. Once ingested, water and nutrients are extracted from food without any conscious control. Throughout the entire process, the ingested material is moved along the GI tract. Finally, the undigested and non-absorbed materials are released as feces from the anus (under voluntary control when socially appropriate!).
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(1) The function of the gastrointestinal (GI) tract can be summarized by the following mechanism(s):
(2) Which one of the following is consistent with absorption of glucose molecules across the intestinal epithelium?
(3) Most of the chemical digestion in the gastrointestinal (GI) tract occurs in the:
(4) Most of the water and electrolytes absorbed across the walls of the gastrointestinal (GI) tract is absorbed in this region:
(5) Fat digestion begins in this region of the gastrointestinal (GI) tract.
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Posted: Wednesday, August 26, 2015
Last updated: Tuesday, March 11, 2025
Last updated: Tuesday, March 11, 2025
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