Question: Nutrients don’t “officially” enter the body until they move from the space inside the digestive tube into the bloodstream.

Answer: true

Question: Saliva begins the process of digestion, with salivary amylase breaking down starch molecules.

Answer: true

Question: In the stomach, highly alkaline gastric juice breaks down food into a pasty substance called chyme.

Answer: false

Question: The small intestine prepares food to move into the large intestine, where most digestion occurs.

Answer: false

Question: The liver produces bile, which is used in the digestion of fat.

Answer: true

Question: Enzymes from the stomach act on carbohydrates, fats, proteins, and nucleic acids in chyme.

Answer: false

Question: At least 57 species of bacteria, including Escherichia coli, normally inhabit our intestines.

Answer: true

Question: Gastrin halts hydrochloric acid secretion in an empty stomach.

Answer: false

Question: Irritable bowel syndrome is an inflammatory disorder that affects various organs, including the eyes, liver, skin, and intestines.

Answer: false

Question: Giardiasis is caused by a protozoan and causes serious diarrhea.

Answer: true