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