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28 Cards in this Set
- Front
- Back
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gastrin stimulates secretion of ____ & ____ in stomach
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enzymes - HCl
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gastrin main target is ____ production by ____ cells
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HCl - parietal
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secretion of gastrin is stimulated by ____ nerve
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vagus
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gastrin is inhibited by the ____
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sympathetics
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3 sites that can stimulate or inhibit gastric secretions
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head - stomach - small intestines
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3 phases that triggers gastrin release
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cephalic phase - gastric phase - intestinal phase
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in cephalic phase, gastrin is triggered by ____, ____, ____, or ____ of food
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sight - smell - taste - thought
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in cephalic phase, the input is relayed through the ____ or ____
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hypothalamus - medulla
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in the cephalic phase, gastrin release is triggered by the ____ nerve
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vagus
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4 examples that trigger gastrin release in the gastric phase
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distension of stomach - presence of petides - caffeine - ↑pH
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in gastric phase, gastrin release is triggered by distension of ____
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stomach
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in gastric phase, gastrin release is triggered by the presence of ____ or ____
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peptides - caffeine
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in gastric phase, gastrin is inhibited by ____ ____
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low pH
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gastrin stimulates ____ secretion by ____ cells
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HCl - parietal
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in gastric phase, histamine __creases ____ by ____ cells
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increases - HCl - parietal
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in gastric phase, histamine from ____ cells also stimulate secretion of ____ by ____ ____
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enteroendocrine - HCl - parietal cells
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in intestinal phase, gastrin release is triggered by partially ____ ____ in the ____
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digested food - duodenum
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4 examples that triggers inhibition of intestinal phase
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low pH - distension of duodenum - irritants - sympathetic innervation
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in intestinal phase, gastrin is inhibited by low ____
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pH
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in intestinal phase, gastrin is inhibited by distension of ____
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duodenum
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in intestinal phase, gastrin is inhibited by irri____
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irritants
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in intestinal phase, gastrin is inhibited by ____ innervation
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sympathetic
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____ cells are involved in gastric motility & emptying
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pacemaker
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pacemaker cells are in a ____ muscle layer
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longitudinal
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pacemaker cells spontaneously ____ & ____
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depolarize - repolarize
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pacemaker cells produce ____ waves at about ____ times per minute
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peristaltic - 3
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food is emptied from the ____, usually within __ hours
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stomach - 4
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fatty foods take about __ hours to be emptied by the ____
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6 - stomach
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