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At the splenic fixture, the colon becomes the
descending colon
Enzymatic breakdown of which of the following compounds doesn't begin until it reaches the stomach?
proteins
Which of the following enzymes is important for the digestion of proteins?
pepsin
Which of the following enzymes is important for the digestion of fat?
pancreatic lipase
In the small intestine, which of the following enzymes breaks down maltose?
glucoamylase
The breakdown products of which of the following are absorbed into lacteals?
fats
The enzyme alpha-amylase that digests polysaccharides is secreted by the __.
pancreas
Which of these statements about water balance in the digestive system is true?
About 2000 ml /day enters by mouth.
About 7000 ml/day enters by secretion.
About 150-200 ml/day is lost in the feces.
All of these statements are true.
All of the above
Lipid-soluble vitamins cross the digestive epithelium primarily by _.
diffusion
The enzyme amylase digests
polysaccharides
An enzyme that digests proteins into peptides is
trypsin
Carbohydrate digestion begins in the
mouth
Products of fat digestion are transported initially by
lymphatic vessels
The absorption of some sugars in the small intestine involves
cotransport
This organ is primarily responsible for water absorption.
large intestine
Absorption of glucose from the gut lumen depends on
the sodium-potassium pump in the basolateral membrane of the epithelial cell, cotransporter proteins in the apical membrane of the epithelial cell, and higher sodium ion concentration in the lumen than in the epithelial cell.
If digestion of a carbohydrate results in equal amounts of glucose and galactose, this carbohydrate is probably
lactose
All of the following are true of the process known as cotransport, except that
ATP is not required by the transport protein.
more than one molecule or ion is moved through the cell membrane at one time.
saturation phenomenon can be observed.
molecules can be moved against a concentration gradient.
only neutral compounds such as sugars are transported.
only neutral compounds such as sugars are transported.
People who lack the enzyme often experience GI upset after consuming milk and other dairy products.
lactase
Each of the following organs is a component of the digestive tract, except the
stomach.
colon.
esophagus.
bladder.
pharynx.
bladder
Which of the following is an accessory organ of digestion?
esophagus
pancreas
colon
spleen
appendix
pancreas
Digestion refers to the
mechanical and chemical breakdown of food.
Which of the following is not a function of the digestive system?
filtration
ingestion
compaction
mechanical processing
absorption
filtration
Which of these descriptions best matches the term myenteric plexus?
component of mucosa
secretes a watery fluid
coordinates activity of muscularis externa
sensory neural network
loose connective tissue layer containing blood vessels
coordinates activity of muscularis externa
Contraction of the alters the shape of the intestinal lumen and moves epithelial pleats and folds.
muscularis mucosa
Large blood vessels and lymphatics are found in the
submucosa
Which of these descriptions best matches the term submucosal plexus?
sensory neural network
A stratified squamous epithelial lining can be found in all of the following, except in the
oral cavity.
anal canal.
oropharynx.
esophagus.
stomach.
stomach
The activities of the digestive system are regulated by
the contents of the digestive tract.
intrinsic nerve plexuses.
hormones.
parasympathetic and sympathetic neurons.
all of the above
all of the above
Waves of muscular contractions that propel the contents of the digestive tract are called
peristalsis
The greater omentum is
a fatty sheet that hangs like an apron over the abdominal viscera
The digestive tract is also referred to as the
alimentary canal and GI tract
The mechanically digests ingested food.
stomach
Which organ is responsible for dehydration and compaction of indigestible materials?
large intestine
The serous membrane that lines the peritoneal cavity
lubricates the cavity.
decreases friction.
prevents irritation.
secretes peritoneal fluid.
all of the above
all of the above
Which of the following is classified as being either squamous or columnar?
digestive epithelium
mucosa
lamina propria
muscularis mucosae
submucosa
digestive epithelium
Approximately liters of fluid are secreted and reabsorbed into the digestive system each day.
7
What provides access for blood vessels entering and leaving the liver?
lesser omentum
The secretion of acid and enzymes by the gastric mucosa is controlled and regulated by
the central nervous system, short reflexes coordinated in the stomach wall, and digestive tract hormones
The small, semisolid mass of food formed during mastication is called a(n) .
bolus
Your patient with liver failure has a firm rounded abdomen due to accumulation of fluid. This is known clinically as .
ascites
The circumferential folds that encircle the digestive tract are known as .
plicae
Match the term with its activity.
Mechanical digestion begins in the oral cavity; enzymatic digestion doesn't begin until food enters the stomach. Are these two statements true or false?
the first is true, the second is false