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Nutrition Ch. 3
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66
Biology
Undergraduate 2
09/20/2012

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Term
Borborygmus
Definition
Grumbling feeling/sound as gas and air pockets form when stomach contents are pushed through the GI tract.
Term
Accessory organs
Definition
Liver, pancreas, gallbladder, aid in digestion by secreting juices into small intestine.
Term
Saliva contains the enzyme...
Definition
amylase which breaks down carbohydrates.
Term
Mechanical digestion in the stomach occurs as...
Definition
the longitudinal, circular, and diagonal muscles squeeze and churn to mix the food with gastric juices
Term
Chyme is
Definition
a nasty-ass combo of digestive secretions plus the food you ate. A semi-liquid mass sitting at the bottom of your stomach.
Term
The upper esophageal sphincter is
Definition
a muscular ring located at the top of the esophagus.
Term
The lower esophageal sphincter is
Definition
a muscular ring located between the base of the esophagus and stomach.
Term
Goblet cells are
Definition
cells throughout the GI tract that secrete mucus.
Term
Gastric pits are
Definition
indentations/small pits in stomach lining where gastric glands are located....these glands produce gastric juices.
Term
The small intestine consists of
Definition
the duodenum, jejunum, and ileum
Term
Villi...
Definition
fingerlike projections that increase surface area in the small intestine
Term
Crypts...
Definition
Glands around the base of villi that secrete intestinal juice
Term
Microvilli
Definition
smaller projections that cover the villi that basically do the same thing
Term
Glycocalyx
Definition
a slimy mucous layer covering the microvilli, containing carbohydrates and protein digesting enzymes
Term
Large intestine consists of
Definition
cecum, colon, rectum.
Term
Chief cells are
Definition
specialized cells in the stomach that secrete an inactive protein digesting enzyme called pepsinogen AND GASTRIC LIPASE
Term
Parietal cells are
Definition
specialized cells in teh stomach that secrete the gastric juices hydrochloric acid and intrinsinic factor?
Term
Segmentation
Definition
muscular contractions of SI that moves food back and forth
Term
Hydrolysis
Definition
chem. reaction that uses water to split bonds of food, catalyzed by enzymes, hydroxyl group from water is added to one of the molecules while the hydrogen ion is incorporated into the other molecule.
Term
Substrate
Definition
a specific compound of nutrient that enzymes must be compatible with to catalyze hydrolitic reactions.
Term
the other two conditions that must be met for enzyme digestion are
Definition
optimal pH and temperature
Term
Proteases are
Definition
protein-digesting enzymes that attack the bonds on proteins once they are denatured by the acidic pH of the stomach
Term
Bile...
Definition
emulsifies fat, reused by cycling back through the entereohepatic circulation
Term
Secretin is
Definition
a hormone secreted from the duodenum that stims the stomach to release pepsin and the pancreas to release digestive juices.
Term
Cholecystokinin
Definition
hormone released by duodenum that stims the gallbladder to release bile
Term
gastric inhibitory peptide
Definition
hormone produced by the small intestine that slows the release of chyme from the stomach
Term
extrinsic nerves
Definition
originate in brain/spinal cord
Term
intrinsic nerves
Definition
woven like a spider web into the linings of the esophagus, stomach, small/large intestines?
Term
ghrelin
Definition
hormone that communicates hunger, released by gastric cells when stomach is empty
Term
peptide YY
Definition
receptors cells lining stomach stretch, releases this, signals that u ate nigga
Term
hepatic portal vein
Definition
water soluble nutrients and vitamins are picked up by capillaries in GI tract and transported out into the blood stream by way of this vein, to the liver
Term
hepatic vein
Definition
from the liver nutrients and vitamins travel back to the heart
Term
lymphatic system
Definition
complex network of caps, small vessels, valves, nodes, ducts, transport fat soluble nutrients through body. connected to the villi of the small intestine
Term
Borborygmus
Definition
Grumbling feeling/sound as gas and air pockets form when stomach contents are pushed through the GI tract.
Term
Accessory organs
Definition
Liver, pancreas, gallbladder, aid in digestion by secreting juices into small intestine.
Term
Saliva contains the enzyme...
Definition
amylase which breaks down carbohydrates.
Term
Mechanical digestion in the stomach occurs as...
Definition
the longitudinal, circular, and diagonal muscles squeeze and churn to mix the food with gastric juices
Term
Chyme is
Definition
a nasty-ass combo of digestive secretions plus the food you ate. A semi-liquid mass sitting at the bottom of your stomach.
Term
The upper esophageal sphincter is
Definition
a muscular ring located at the top of the esophagus.
Term
The lower esophageal sphincter is
Definition
a muscular ring located between the base of the esophagus and stomach.
Term
Goblet cells are
Definition
cells throughout the GI tract that secrete mucus.
Term
Gastric pits are
Definition
indentations/small pits in stomach lining where gastric glands are located....these glands produce gastric juices.
Term
The small intestine consists of
Definition
the duodenum, jejunum, and ileum
Term
Villi...
Definition
fingerlike projections that increase surface area in the small intestine
Term
Crypts...
Definition
Glands around the base of villi that secrete intestinal juice
Term
Microvilli
Definition
smaller projections that cover the villi that basically do the same thing
Term
Glycocalyx
Definition
a slimy mucous layer covering the microvilli, containing carbohydrates and protein digesting enzymes
Term
Large intestine consists of
Definition
cecum, colon, rectum.
Term
Chief cells are
Definition
specialized cells in the stomach that secrete an inactive protein digesting enzyme called pepsinogen AND GASTRIC LIPASE
Term
Parietal cells are
Definition
specialized cells in teh stomach that secrete the gastric juices hydrochloric acid and intrinsinic factor?
Term
Segmentation
Definition
muscular contractions of SI that moves food back and forth
Term
Hydrolysis
Definition
chem. reaction that uses water to split bonds of food, catalyzed by enzymes, hydroxyl group from water is added to one of the molecules while the hydrogen ion is incorporated into the other molecule.
Term
Substrate
Definition
a specific compound of nutrient that enzymes must be compatible with to catalyze hydrolitic reactions.
Term
the other two conditions that must be met for enzyme digestion are
Definition
optimal pH and temperature
Term
Proteases are
Definition
protein-digesting enzymes that attack the bonds on proteins once they are denatured by the acidic pH of the stomach
Term
Bile...
Definition
emulsifies fat, reused by cycling back through the entereohepatic circulation
Term
Secretin is
Definition
a hormone secreted from the duodenum that stims the stomach to release pepsin and the pancreas to release digestive juices.
Term
Cholecystokinin
Definition
hormone released by duodenum that stims the gallbladder to release bile
Term
gastric inhibitory peptide
Definition
hormone produced by the small intestine that slows the release of chyme from the stomach
Term
extrinsic nerves
Definition
originate in brain/spinal cord
Term
intrinsic nerves
Definition
woven like a spider web into the linings of the esophagus, stomach, small/large intestines?
Term
ghrelin
Definition
hormone that communicates hunger, released by gastric cells when stomach is empty
Term
peptide YY
Definition
receptors cells lining stomach stretch, releases this, signals that u ate nigga
Term
hepatic portal vein
Definition
water soluble nutrients and vitamins are picked up by capillaries in GI tract and transported out into the blood stream by way of this vein, to the liver
Term
hepatic vein
Definition
from the liver nutrients and vitamins travel back to the heart
Term
lymphatic system
Definition
complex network of caps, small vessels, valves, nodes, ducts, transport fat soluble nutrients through body. connected to the villi of the small intestine
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