ATI RN
Digestive System Exam Questions Questions
Question 1 of 5
Match: Disaccharide
Correct Answer: A
Rationale: Disaccharides, like sucrose, consist of two monosaccharides linked together and are broken down into simpler sugars during digestion.
Question 2 of 5
Which statement about chemical digestion in the human alimentary canal is correct?
Correct Answer: C
Rationale: Protein digestion begins in the stomach with pepsin and is completed in the ileum by proteolytic enzymes from the pancreas and intestinal mucosa.
Question 3 of 5
Food tests were carried out on four different substances. Which substance contained both protein and reducing sugar?
Correct Answer: A
Rationale: Substances testing positive for both the biuret test (protein) and Benedict's test (reducing sugar) indicate the presence of both protein and reducing sugars.
Question 4 of 5
Which of these human teeth are used for grinding?
Correct Answer: D
Rationale: Molars are flat, broad teeth specialized for grinding food.
Question 5 of 5
Which layer of GI tract forms the innermost lining and continuously secretes mucus?
Correct Answer: D
Rationale: The mucosa is the innermost layer of the GI tract, lined with epithelial cells that secrete mucus to protect the tract and lubricate food passage.