Small intestine

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Last updated 4:39 AM on 5/16/26
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13 Terms

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Duodenum

Chemical digestion

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Jejunum

Chemical digestion & absorption

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Ileum

Absorption

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Ileocecal valve

Connects ileum to cecum of large intestine

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Ileocecal valve function

Chemical digestion & absorption of nutrients

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Celiac disease

Autoimmune disease where gluten stimulates an immune response that damage villi

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Hormones produced by duodenum

Secretin & Cholecystokinin

  • Slow stomach emptying

  • Stimulate secretion of pancreatic juice

  • Stimulate release of bile

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Sucrase

Splits sucrose

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Lactase

Splits lactose

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Lactose intolerance

Don’t produce enough lactase so person can’t digest lactose; results in diarrhea, gas, bloating, cramping from dairy products

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Maltase

Splits maltose

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Peptidases

Break peptides into amino acids

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Nutrient absorption in the small intestine

  • Absorbs a lot of water

  • Digested lipids are packed into chylomicrons and absorbed by lacteals into lymphatic system

  • All other nutrients are absorbed by capillaries into the bloodstream