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50 terms

Chap 23

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pancreas
organ that secretes the most potent digestive enzymes
liver
organ that secretes bile
stomach
the organ that secretes hydrochloric acid and pepsinogen
duodenum
most digestion and absorption takes place in this part of the small intestine
chyme
the stomach mashes food into a paste called _____________
vagus
the primary autonomic nerve that supplies the GI tract
esophagus
food tube; from pharynx to stomach
colon
ascending, transverse, descending, sigmoid
cecum
the appendix attaches to this structure
ileocecal
valve between the small intestine and large intestine
LES
gastric reflux involves this valve
disaccharidases
sucrase, lactase, maltase
bile
mechanically breaks a large fat globule into many smaller fat globules
lipase
the enzyme that splits fats into fatty acids and glycerol
protease(s)
trypsinogen and chymotrypsinogen
HCl
responsible for the gastric pH
intrinsic factor
a deficiency causes pernicious anemia
cholecystokinin
hormone secreted by the walls of the duodenum; stimulates the pancreas to secrete potent digestive enzymes
secretin
hormone secreted by the walls of the duodenum; stimulates the pancreas to secrete a bicarbonate-rich secretion
gastrin
hormone secreted by the stomach; causes the secretion of HCl
amylase(s)
enzymes that digest carbohydrates/starches to the disaccharide stage
Which of the following is not true of the salivary glands?
secrete the most important of the digestive enzymes
The epiglottis
is a hollow tube that carries food from the pharynx to the stomach.
The stomach
delivers chyme to the duodenum at the proper rate.
With which word is deglutition most associated?
swallowing
Paralytic ileus is the
slowing or cessation of peristalsis.
Which of the following best describes the omentum and the mesentery?
serous membrane
Which of the following is not a function of the stomach?
synthesis of plasma proteins especially albumin
Which of the following is not descriptive of bile?
classified as a lipase
Lipases, proteases, and amylases are
digestive enzymes.
Fat digestion is accomplished by
bile and lipase.
The gallbladder
contracts in response to cholecystokinin.
Which of the following is not a function of the liver?
secretes cholecystokinin and secretin
Which of the following best describes emulsification?
A large fat globule is mechanically broken into smaller fat globules.
Which of the following organs or structures is essential to life (can't live without it)?
liver
The pancreas
secretes the most potent digestive enzymes.
Which of the following is least related to the appendix?
regulates the rate at which the contents of the ilium are delivered to the cecum
The duodenum is most concerned with
digestion and absorption.
The common bile duct
empties bile into the duodenum.
Relaxation of the sphincter of Oddi allows
bile to enter the duodenum from the common bile duct.
An amylase and disaccharidase both
digest carbohydrates.
The canaliculi, hepatic duct, and the cystic duct
carry bile.
The digestive end products are absorbed into the
portal circulation.
Trypsin is
proteolytic, pancreatic, digestive
Which of the following is most related to the small intestine?
duodenum, jejunum, and ileum
This chemical aid unravels dietary protein and decreases bacteria in the stomach.
HCl
Ptyalin is
salivary amylase.
Which of the following is (are) true of cholecystokinin (CCK)?
secreted by the walls of the duodenum in response to the presence of fat, stimulates the gallbladder to contract, thereby delivering bile to the duodenum, also stimulates the pancreas to secrete digestive enzymes
The vagus nerve
is the most important nerve of the digestive tract.
Which drug action increases gut motility and is therefore used in the treatment of paralytic ileus?
activates muscarinic receptors