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