Quiz 3

Created by alana_mueller 

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The process by which food is broken down into absorbable components is called
a. digestion
b. absorption
c. intestinalis
d. mastication

Digestion

In what organ does the digestion process begin?
a. Mouth
b. Stomach
c. Duodenum
d. Jejunum-ileum

Mouth

Where is the epiglottis located?
a. Throat
b. Bile duct
c. Pancreatic duct
d. Lower esophagus

Throat

What part of the GI tract prevents a person from choking while swallowing?
a. Mouth
b. Epiglottis
c. Pyloric sphincter
d. Upper esophageal sphincter

Epiglottis

What is a bolus?
a. Enzyme that hydrolyzes starch
b. Portion of food swallowed at one time
c. Device used to analyze the contents of the stomach
d. Sphincter muscle separating the stomach from the small intestine

Portion of food swallowed at one time

What is one function of the pyloric sphincter?
a. Secretes acid into the stomach
b. Secretes hormones into the stomach
c. Prevents the contents of the small intestine from backing up into the stomach
d. Prevents the contents of the small intestine from emptying too quickly into the colon

Prevents the contents of the small intestine from backing up into the stomach

What structure controls the passage of material from the small intestine to the large intestine?
a. Pyloric valve
b. Ileocecal valve
c. Cardiac sphincter
d. Jejunum sphincter

Ileocecal valve

After swallowing, in what order does food pass through the regions of the GI tract?
a. esophagus, jejunum, duodenum,
colon, ileum, rectum
b. jejunum, ileum, duodenum, rectum, colon, esophagus
c. esophagus, stomach, duodenum, jejunum, ileum, colon
d. esophagus, stomach, jejunum, duodenum, colon, ileum

esophagus, stomach, duodenum, jejunum, ileum, colon

Which of the following is a description of chyme?
a. The semisolid mass of undigested food which passes through the ileocecal valve
b. A semi-liquid mass of partially digested food released by the stomach into the small intestine
c. The mixture of pancreatic juices containing enzymes for digestion of the macronutrients
d. A thick, viscous material synthesized by mucosal cells for protection against digestive juices

A semi-liquid mass of partially digested food released by the stomach into the small intestine

Which of the following is a feature of peristalsis?
a. It remains quiet between meals when the GI tract is empty
b. It occurs along the GI tract at a constant rate when food is present
c. It involves parallel and circular muscles found in the walls of the intestines but not the stomach
d. It consists of wavelike muscular contractions resulting from alternate tightening and relaxing of circular muscles and longitudinal muscles

t consists of wavelike muscular contractions resulting from alternate tightening and relaxing of circular muscles and longitudinal muscles

What types of enzymes are responsible for hydrolyzing the proteins in foods?
a. Lipase
b. Lactase
c. Protease
d. Amylase

Protease

What is the function of mucus in the stomach?
a. Emulsifies fats
b. Neutralizes stomach acid
c. Activates pepsinogen to pepsin
d. Protects stomach cells from acidity of gastric juices

Protects stomach cells from acidity of gastric juices

Which of the following best describes the normal pH of the stomach?
a. Very acidic
b. Slightly acidic
c. Neutral
d. Slightly alkaline

Very acidic

Which of the following body organs does not secrete digestive enzymes?
a. Liver
b. Stomach
c. Pancreas
d. Salivary glands

Liver

The process by which bile acts on fat so enzymes can attack the fat is known as....
a. condensation
b. emulsification
c. reduction
d. phosphorylation

emulsification

After the pancreatic juices have mixed with chyme in the small intestine, which of the following describes the pH of the resulting mixture?
a. Very acidic
b. Moderately acidic
c. Strongly alkaline
d. Approximately neutral

Approximately neutral

Which of the following is not a component of pancreatic juice?
a. Bile
b. Water
c. Lipase
d. Sodium bicarbonate

Bile

What is one function of the gallbladder?
a. Stores bile
b. Produces bile
c. Reabsorbs water and salts
d. Performs enzymatic digestion

Stores Bile

Which of the following is not a normal component of stools?
a. Water
b. Fiber
c. Blood
d. Bacteria

Blood

Which of the following nutrients requires the least amount of digestion?
a. Starch
b. Calcium
c. fats
d. proteins

Calcium

Which of the following products of digestion is not normally released directly into the bloodstream?
a. Fats
b. Minerals
c. Vitamin C
d. Carbohydrates

Fats

The hepatic portal vein empties into the...
a. liver
b. heart
c. pancreas
d. hepatic vein

Liver

When alcohol and barbiturates are ingested, they are absorbed from the gastrointestinal tract and transported first to the....
a. liver
b. heart
c. spleen
d. kidneys

Liver

What are lacteals?
a. Gastric secretory cells
b. Products of milk digestion
c. Intestinal lymphatic vessels
d. Products of colonic fermentation

Intestinal lymphatic vessels

The living bacteria found in yogurt are known as...
a. probiotics
b. prebiotics
c. postbiotics
d. zymobiotics

probiotics

What is the primary role of the normal, thriving intestinal bacterial population?
a. Helps degrade meat and dairy proteins
b. Helps prevent infectious (pathogenic) bacteria from attacking the system
c. Synthesizes vitamin D, which can be absorbed into the body
d. Synthesizes several amino acids which can be absorbed into the body

Helps prevent infectious (pathogenic) bacteria from attacking the system

The presence of fat in the intestines stimulates cells of the intestinal wall to release.....
a. lipase
b. gastrin
c. secretin
d. cholecystokinin

cholecystokinin

Which of the following digestive system hormones is produced by the stomach?
a. pepsin
b. gastrin
c. secretin
d. cholecystokinin

gastrin

Which of the following results from reverse peristalsis?
a. Gas
b. Choking
c. Vomiting
d. Diarrhea

vomiting

The Heimlich maneuver may be helpful in conditions associated with
a. choking.
b. vomiting.
c. heartburn.
d. constipation.

choking

Match hormone with its action:
stimulates release of hydrochloric acid
causes the gallbladder to realease bile
causes the release of bicarbonate by the pancreas
decreases release of acid by stomach

gastrin
cholecystokinin
secretin
gastric inhibitory peptide

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