ATI RN
Digestive System Multiple Choice Questions Questions
Question 1 of 5
How many salivary glands are found in a man?
Correct Answer: D
Rationale: Humans have three pairs of major salivary glands: parotid, submandibular, and sublingual.
Question 2 of 5
Which type of motility in the large intestine helps in the absorption of water and electrolytes?
Correct Answer: B
Rationale: Segmentation in the large intestine involves rhythmic contractions that mix contents, increasing contact time with the mucosa for water and electrolyte absorption.
Question 3 of 5
Peristalsis in the muscle component of the human esophagus is produced by:
Correct Answer: D
Rationale: Sequential firing of vagal nerves from the nucleus ambiguus coordinates esophageal peristalsis, moving food downward.
Question 4 of 5
Which motor activity is primarily responsible for mixing and churning food in the small intestine to enhance digestion and absorption?
Correct Answer: B
Rationale: Segmentation mixes chyme with digestive enzymes and increases mucosal contact for absorption in the small intestine.
Question 5 of 5
How many muscles does the action of swallowing use?
Correct Answer: D
Rationale: Swallowing involves approximately 29 muscles, including those in the pharynx and esophagus, coordinated by the autonomic nervous system.