ATI RN
Digestive System Multiple Choice Questions Questions
Question 1 of 5
What is the role of mucus secreted by the stomach?
Correct Answer: A
Rationale: Mucus or Gastric mucus is a gel barrier secreted by epithelial cells & glandular cells in the stomach wall. It protects the inner lining of the stomach from HCl.
Question 2 of 5
The products of digested food are present in the ileum. Which substances enter a blood capillary and a lacteal in a villus?
Correct Answer: A
Rationale: Amino acids and glucose enter the blood capillaries, while fatty acids and glycerol are absorbed into the lacteals.
Question 3 of 5
The diagram shows a section through a villus. Y X What is a function of structure X and of structure Y?
Correct Answer: A
Rationale: Structure X (epithelial cells) absorbs amino acids, while structure Y (goblet cells) secretes mucus.
Question 4 of 5
Food and chyme are pushed through the digestive system by:
Correct Answer: D
Rationale: Peristalsis refers to the rhythmic contractions of smooth muscle that propel food and chyme through the digestive tract.
Question 5 of 5
How many pairs of salivary glands produce saliva, which contains amylase to start digestion of dietary starch?
Correct Answer: B
Rationale: Humans have three pairs of salivary glands (parotid, submandibular, sublingual) that produce saliva containing amylase; not five as originally asserted.