The process by which food is broken down into absorbable components is called
In what organ does the digestion process begin?
Where is the epiglottis located?
b. Bile duct
c. Pancreatic duct
d. Lower esophagus
What part of the GI tract prevents a person from choking while swallowing?
c. Pyloric sphincter
d. Upper esophageal sphincter
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
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?
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
d. Slightly alkaline
Which of the following body organs does not secrete digestive enzymes?
d. Salivary glands
The process by which bile acts on fat so enzymes can attack the fat is known as....
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
Which of the following is not a component of pancreatic juice?
d. Sodium bicarbonate
What is one function of the gallbladder?
a. Stores bile
b. Produces bile
c. Reabsorbs water and salts
d. Performs enzymatic digestion
Which of the following is not a normal component of stools?
Which of the following nutrients requires the least amount of digestion?
Which of the following products of digestion is not normally released directly into the bloodstream?
c. Vitamin C
When alcohol and barbiturates are ingested, they are absorbed from the gastrointestinal tract and transported first to the....
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...
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.....
Which of the following digestive system hormones is produced by the stomach?
Which of the following results from reverse peristalsis?
The Heimlich maneuver may be helpful in conditions associated with