McGraw Digestive
Bicarbonate ions formed during the dissociation of carbonic acid...
Are transported back into the blood stream
Where is the enzyme sucrase found?
Attached to the luminal surface of intestinal epithelial cells
Which of the following is not secreted by the stomach to aid in digestion? -bile -Hydrochloic acid -Regulatory hormones -Peosinogen
Bile
A portal triad consists of which three elements?
Branches of the hepatic artery, hepatic portal vein and bile duct
sm intestine that receives bile and pancreatic juice
Duodenum
Gastric secretion is increase in all three phases (cephalic, gastric, intestinal). True or false?
False
Sucrase...
Hydroplyzes surcrose into glucose and fructose
Which cell type is responsible for HCI production in the stomach
Parietal cells
The process of moving a bolus through the GI tract as a result of involuntary muscle contractions is referred to as
Peristalsis
Which of the following is not a function of the digestive system ? -Waste elimination -Production of ATP -Nutrient absorption -Mechanical digestion
Production of ATP
Basic functions of the liver include..
Secretion, storage and detoxification
From external to internal, what is the correct order of layers of the stomach?
Serosa, muscularis, submuscosa and mucosa
How long can sucrase facilitate the hydrolysis of sucrose?
Sucrase can hydrolyze sucrose until the enzyme becomes denatured, is inhibited, or wears out
Which of the following might stimulate the cephalic phase of gastric secretion?
The thought of food
How do chloride ions that are used to make HCI enter the parietal cell?
They are transported into the parietal cells from the blood stream in exchange of bicarbonate ions
What is required for hydrolysis. True or False?
True
Which phases of gastric secretion is (are) regulated by the medulla oblongata?
all three phases are regulated. the cephalic gastric, intestinal
Salivary __________ breaks the chemical bond between two glucose molecules; it breaks down the long polysaccharide starch molecule into smaller and smaller pieces until only glucose results.
amylase
Which region of the stomach is continuous with the esophagus?
cardiac region
What are the three phases of gastric secretion?
cephalic gastric, intestinal
Functions of the stomach include
chemical and mechanical digestion
Which cell of the gastric glands produced pepsinogen?
chief cell
The liver lobule is the same as a hepatocyte. True or False?
false
Mass movements in the color stimulated by
food in the stomach & chyme in the duodenum
the greater omentum extends inferiorly like an apron from the ____ of the stomach and covers most organs
greater curvature
sm intestine that controls entry of material into lg intestine
ileum
sm intestine that performs most chem digestion and absorption
jejunum
bacteria in the ____ intestine produces vitamins
large
The stomach is located in which abdominal quadrant?
left upper
What organ produces bile?
liver
the mucosa of the esophagus is lined with
nonkeratinized stratified
mixed gland with endocrine and exocrine functions that produces the majority of the digestive enzymes
pancreas
Defecation is stimulated by
parasympathetic and local reflexes
Between the parietal and visceral peritoneum is the thin
peritoneal cavity
Which ions are counter transported back into the partial cells as the hydrogen ion are transported out into the gastric juice?
potassium ion
Gastric secretion during the intestinal phase is inhibited by the...
presence of lipids or low pH
most gi organs are lined with a ____ epithelium
simple columnar
stomach is lined by
simple columnar epithelium
CCK hormones secreted in which gi organ
small intestine
Most nutrients absorption occurs in the
small intestine
the muscularis usually contains two layers of ____ muscle
smooth
HCL acid is secreted in the
stomach
which organ is in the gi opposes to accessory organ
stomach
Movements of the colon are integrated by
the enteric phase
Which two fetal remnant are found on the liver?
the round ligament and the ligamentum venosum
What molecule is the ultimate source of hydrogen ions that are secreted into the gastric juice?
water
