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15 Cards in this Set
- Front
- Back
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what are the 6 processes of digestion?
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ingestion
mechanical processing digestion swcretion absobpion excretion |
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what is the difference between chemical and mechanical digestion?
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chemical- when small particles are broken down into molecules by enzymes (small intestines)
mechanical- when large particles are broken down into smaller pieces manually (oral cavity) |
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what is peristalsis?
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process that propels materials along the digestive tract
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what is segmentation?
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when particles are churned and fragmented through mixing in the stomach
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what is the role of salivary glands?
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coats food so that swallowing is easier. releases enzymes to break down starches and contains buffers
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what are the key events in swallowing?
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swallowing begins in the mouth
the toungue compacts it and guides it to the back of the mouth the epiglottis forces food to the esophagus the esophagus carries food down to stomach |
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how is gastric secretion controlled?
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controlled by central nervous system, regulated by reflexes and hormonesof the digestive tract
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what are the phases of gastric secretion?
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cephalic phase
gastric phase intestinal phase |
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true or false
the stomach absorbes nutrients and enzymes before carrying it off to the small intestines |
false. the stomach cannot absorb anything
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what are the ways that the small intestines increase surface area?
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it has microvilli and plicae circulares.
has 3 portions: duodenum, jejunum, ileum |
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name the 4 layers of the GIT
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mucosa
submucosa muscularis externa serosa |
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what are the 3 sub layers of the mucosa?
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mucus epithelium
lamina propria muscularis mucosae |
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which of the following layers has parapymphathetic neurons? (more than one answer)
mucosa submucosa muscularis externa serosa |
submucosa
muscularis externa |
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of the following layers, which one has muscles that control peristalsis and segmentation?
mucus epithelium lamina propria muscularis externa muscularis mucosae |
muscularis externa
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which of the following layers have capillaries that drain into larger veins that will eventually drain into the hepatic portal vein?
mucosa muscularis mucosae submucosa serosa none of the above |
mucosa
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