ch 24 DIGESTION
During deglutition,
All of the answers are correct
Functions of teeth include
All of the answers are correct
In response to the hormone secretin, the pancreas secretes a fluid rich in bicarbonate ion. rich in enzymes. rich in bile. rich in mucus. that contains only amylase.
All of the answers are correct
The Kupffer cells of the liver
All of the answers are correct
The activities of the digestive system are regulated by
All of the answers are correct
The essential functions of the liver include
All of the answers are correct
The serous membrane that lines the peritoneal cavity ANSWER: secretes peritoneal fluid. decreases friction. lubricates the cavity. prevents irritation. All of the answers are correct
All of the answers are correct
Tony is a chronic alcoholic with cirrhosis of the liver, a condition in which liver cells die and are replaced by connective tissue. Which of the following signs would you expect to observe in Tony? ANSWER: decrease in plasma protein production portal hypertension and ascites jaundice increased clotting time All of the answers are correct.
All of the answers are correct
During the cephalic phase of gastric secretion,
there is an increased flow of action potentials along the vagus nerve to the stomach.
An enzyme that digests proteins into peptides is
trypsin
An obstruction of the common bile duct often results in
undigested fat in the feces
Which of these gut hormones and actions are mismatched?
vasoactive intestinal peptide; inhibit intestinal blood flow
The space between the cheeks or lips and the teeth is called the
vestibule.
What chemical is found in the fluid that flows through the pancreatic duct?
Trypsinogen
A drug that blocks the action of carbonic anhydrase in parietal cells would result in
a higher pH during gastric digestion.
The digestive tract is also referred to as the
alimentary canal and the GI tract.
The enzyme that digests starch into disaccharides and trisaccharides is ________.
amylase
In the small intestine, which of the following enzymes breaks down maltose?
b
Which of these descriptions best matches the term cholecystokinin (CCK)?
causes gallbladder to contract
An intestinal hormone that stimulates the gallbladder to release bile is
cholecystokinin
Plicae circulares are
circumferential folds in the mucosa and submucosa of the small intestine
The duodenal ampulla receives secretions from the
common bile duct and the pancreatic duct
he root of a tooth is covered by
dentin.
Pancreatic juice enters the small intestine at the ________.
duodenal papilla
The crown of a tooth is covered by
enamel.
The breakdown products of which of the following are absorbed into lacteals?
fats
Bile is stored in the
gallbladder
An intestinal hormone that stimulates the release of insulin from the pancreatic islet cells is
gastric inhibitory peptide (GIP)
An intestinal hormone that stimulates gastric secretion is
gastrin
G cells of the stomach secrete
gastrin
the hormone that stimulates secretion and contraction by the stomach is
gastrin
Parietal cells secrete
hydrochloric acid
The pH of the blood in gastric veins
is greater during digestion of a large meal than following a 24-hour fast.
Tom has hepatitis, an inflammation of the liver. Which of the following symptoms would you expect to observe in Tom?
jaundice
The middle segment of the small intestine is the
jejunum
Which layer of the digestive tract directly underlies the epithelium?
lamina propria
What organ is primarily responsible for water absorption?
large intestine
Which organ is responsible for dehydration and compaction of indigestible materials?
large intestine
What provides access for blood vessels entering and leaving the liver?
lesser omentum
Products of fat digestion are transported initially by
lymphatic vessels
Powerful peristaltic contractions that occur a few times each day in the colon are called
mass movements.
Digestion refers to the.
mechanical and chemical breakdown of food.
The double-layer sheets of serous membrane that support the viscera are called
mesenteries
Carbohydrate digestion begins in the
mouth
the lamina propria and mucous epithelium are components of the
mucosa
Which of the following is an accessory organ of digestion?
pancreas
hich of the following enzymes is important for the digestion of fat?
pancreatic lipase
Increased secretion by all the salivary glands results from
parasympathetic stimulation.
Functions of the tongue include all of the following, except
partitioning the oropharynx from the nasopharynx.
Which of the following enzymes is important for breaking down protein?
pepsin
Chief cells secrete
pepsinogen
Waves of muscular contractions that propel the contents of the digestive tract are called
peristalsis.
The enzyme amylase digests
polysaccharides
The uvula is located at the
posterior margin of the soft palate.
Enzymatic breakdown of which of the following compounds doesn't begin until it reaches the stomach?
proteins
The enzyme pepsin digests
proteins
The part of a tooth that contains blood vessels and nerves is the
pulp cavity.
The region of the stomach that empties into the duodenum is the
pylorus
All of the following are true of the lining of the stomach, except that it
recycles bile.
Functions of the large intestine include
resorption (absorption) of water and compaction of feces.
n response to the hormone cholecystokinin, the pancreas secretes a fluid
rich in enzymes
he prominent ridges in the lining of the empty stomach are called
rugae
The intestinal hormone that stimulates the pancreas to release a watery, bicarbonate-rich fluid is
secretin
Hydrochloric acid from the stomach is neutralized in the small intestine by:
sodium bicarbonate from the pancreas
stratified squamous epithelial lining can be found in all of the following, except in the
stomach
Which of the following is true regarding lactose intolerance?
the intestinal crypts are not producing the enzyme lactase