What design features of the small intestine aid in absorption
circular fold and villi
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15
What part of the digestive tract absorbs the most nutrients?
small intestine
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describe deglutition.
the act of swallowing:1. Soft palate rises up blocking off the nasal cavity, 2.the larynx rises and the epiglottis drops sealing off the larynx
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15
What is Chyme?
a mixture of the bolus and gastric juices
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15
What are 4 substances that decrease the acidity in the alimentary canal?
1. alkaline mucous from the duodenal glands 2.Intestinal juice from the intestinal glands 3.Bile from the gall bladder 4. bicarbonate in pancreatic juice
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what is the serosa of the stomach called?
visceral peritoneum
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What contains glands that produce CCK? (Cholecystokinin)
Small intestine, (in response to fatty chyme. Its name means โgallbladder contractor.โ)( Chole:bile, cystic:sac, kinen:contract)
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20
What are two vitamins that can be produced by the body as well as be absorbed from food?
vitamin D, K, B12, D and biotin can be made by the body
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What structure has endocrine and exocrine functions?
pancreas
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What is intrinsic factor?
a chemical secreted by the gastric glands that allows your body to absorb B12.
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What produces bile? Where is it stored?
The liver produces bile (in the sinusoids) and the gall bladder stores it
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What contains glands that produce secretin? Where does it get secreted into? What does it do?
small intestine (duodenum), it gets secreted into the capillaries in response to acidic chyme.
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Gastric glands produce pepsinogen. Why don't they produce pepsin, which is what the stomach actually needs to aid digestion?
A cell canโt make an active enzyme that breaks proteins into peptides and amino acids, because the cell is protein.