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Quiz 3

STUDY
PLAY
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