ATI RN
Digestive System Questions Questions
Question 1 of 5
Which digestive processes take place in the mouth (buccal) cavity?
Correct Answer: D
Rationale: In the mouth, food undergoes mechanical digestion via chewing, chemical digestion through salivary amylase, and dissolving of nutrients.
Question 2 of 5
The pH in the mouth decreases after eating. Which statement explains the decrease in pH?
Correct Answer: A
Rationale: Bacterial metabolism of food releases acids, lowering the pH in the mouth.
Question 3 of 5
Which of the following secretions is NOT produced by gastric glands?
Correct Answer: D
Rationale: Sebum is an oily substance produced by sebaceous glands in the skin, not by gastric glands, which secrete HCl, intrinsic factor, and pepsin.
Question 4 of 5
What is the structural composition of the liver?
Correct Answer: A
Rationale: The liver consists of lobules, functional units where hepatocytes radiate from a central vein, facilitating its metabolic roles.
Question 5 of 5
Which process matches the definition: Circular muscles behind a bolus of food contract and longitudinal muscles relax, thus pushing a bolus of food onwards?
Correct Answer: B
Rationale: Peristalsis involves coordinated muscle contractions to push food forward.