BIO 222 Digestive System HW (Ch. 24/25)
during the cephalic phase of gastric secretion...
CNS sensory or cognitive activation increases neural stimulation of the stomach
the mesocolon is...
a mesentery associated with a portion of the large intestine
the functions of the oral cavity include all of the following except...
absorption of monosaccharides
a drug that blocks the action of the hormone cholecystokinin would affect all of the following except...
absorption of water in the large intestines
Which of the following is not a digestive enzyme?
bile
the fusion of the common hepatic duct and the cystic duct forms the...
bile duct
the duodenal ampulla receives secretions from the...
bile duct and the pancreatic duct
the end products of aerobic respiration are...
carbon dioxide, water, ATP
Which of the following descriptions best matches the term cholecystokinin (CCK)?
causes gallbladder to contract
the lipoproteins that carry absorbed lipids from the intestinal tract to the bloodstream are...
chylomicrons
a feature of the digestive tract wall that increases surface area available for absorption is the...
circular folds
Oxygen is an important molecule in which of the following?
citric acid cycle and ETC
a disease that attacks and disables the myenteric plexus would...
decrease intestinal motility
within the oral cavity, both mechanical and chemical _____ begin
digestion
put the following layers of the digestive tract wall in order from the lumen to the deepest layer
digestive (mucous) epithelium, lamina propria, muscularis mucosae, submucosa, muscularis externa, serosa
submucosal glands that secrete mucus are characteristic of the...
duodenum
most of the ATP from metabolism is produced in the...
electron transport chain
absorption of glucose from the gut lumen depends on all of the following except...
emulsification forming small micelles
Which is not a reason the stomach is acidic?
emulsification of lipids
an intestinal hormone that stimulates mucin production by the submucosal duodenal glands is...
enterocrinin
the structure that marks the division between the right and left lobes of the liver is the...
falciform ligament
blockage of the common hepatic duct would interfere with digestion of...
fats
Which of the following is not a function of the digestive system?
filtration
during the citric acid cycle, both NAD and FAD _____ a hydrogen atom and become _______
gain; reduced
the middle segment of the small intestine is the...
jejunum
the villi are most developed in the...
jejunum
Which organ is responsible for dehydration and compaction of indigestible materials?
large intestine
carbohydrate digestion begins in the...
mouth
in oxidative phosphorylation, energy for the synthesis of ATP is directly obtained from the...
movement of hydrogen ions through channels in the inner mitochondrial membrane
the gastroileal reflex...
moves some chyme to the colon
the _____ gland empties into the oral cavity at the level of the second upper molar
parotid
functions of the tongue include all of the following except...
partitioning the oropharynx from the nasopharynx
chief cells secrete...
pepsinogen
the enzyme amylase digests...
polysaccharides
all of the following are true of the intestinal phase of gastric digestion except that it...
precedes the gastric phase
Which of the following is true regarding digestion and absorption in the stomach?
protein digestion begins in the stomach
the region of the stomach that empties into the duodenum is the....
pyloric part
functions of the large intestine include...
reabsorption of water and compaction of feces
Which of the following descriptions best matches the term submucosal plexus?
sensory neural network
Which of the following descriptions best matches the term gastrin?
stimulates gastric secretion
chemical protein digestion begins in the...
stomach
place the following structures in order as food passes into them
stomach, duodenum, jejunum, ileum, cecum
Which salivary gland produces a mucous rich secretion that acts as a buffer and lubricant?
sublingual
the stomach is different from other digestive organs in that it...
has three layers of muscle in the muscularis externa
____ are arranged within a lobule of the liver into a series of irregular plates converging toward a central vein
hepatocytes
the essential functions of the liver include all of the following except...
hormonal regulation
Which is not part of the large intestine?
ileum
the teniae coli are...
longitudinal bands of smooth muscle in the colon wall
the esophagus has several variations from the standard plan of the GI tract; these include...
muscularis externa has some skeletal muscle
Which of the following is an accessory organ of digestion?
pancreas
the exocrine portion of the pancreas is composed of...
pancreatic acini
the defecation reflex involves...
relaxation of both the internal and external anal sphincters
in response to the hormone secretin, the pancreas secretes a fluid...
rich in bicarbonate ion
Which is not true of pancreatic enzymes?
their primary site of action is the pancreas
at the hepatic flexure, the colon becomes the...
transverse colon
impaired fat absorption in the intestine would interfere with the absorption of...
vitamin A