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20 Cards in this Set
- Front
- Back
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What molecular weight will allow a molecule to diffuse through cells? |
<=200 Daltons |
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What term refers to swallowing of food? |
Deglutition |
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What term refers to stomach retropulsion? |
Antral-pyloric pumping |
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What terms refers to the mixing movements of the GI tract? (2) |
segmentation, haustration |
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What term refers to periodic peristalsis of the GI tract? |
Mass movement |
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Why is it important to move food quickly through the gut? |
If not ingested, can grow bacteria |
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What is the purpose of muscularis mucosae? |
Protection to move noxious substance out fast |
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What layer of the GI mucosa contains lymph vessels? |
lamina propria |
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What type of tissue lines the GI tract? |
simple columnar epithelium |
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What cells secrete mucus? |
Goblet cells |
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In what layer is vasculature found? |
Submucosa |
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What nervous plexus is located between the circular and longitudinal muscles? |
Myenteric plexus |
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Which striated muscle along the GI tract is tonically contracted with a high tone most of the time? |
Upper esophageal sphincter |
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Why is pressure in the mid-esophagus sub-atmospheric? |
The pleural cavity creates negative pressure, which widens the esophagus and speeds deliver to the stomach |
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How much water is drunk each day? |
1200 mL/day |
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How much water is lost in feces today? |
100 mL/day |
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How much water is secreted via saliva daily? |
1500 mL/day |
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How much water is secreted via gastric secretions daily? |
2000 mL/day |
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How much water is secreted via pancreatic secretions daily? |
1500 mL/day |
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How much water is secreted via bile daily? |
500 mL/day |
