,NURS 231 Module 7 Exam Prep |
Pathophysiology | Portage Learning |
2026/2027
1. Which of the following correctly lists the accessory organs of the gastrointestinal system?
A. Stomach, small intestine, and large intestine
B. Salivary glands, liver, and pancreas
C. Esophagus, stomach, and duodenum
D. Gallbladder, appendix, and spleen
Correct Answer: B. Salivary glands, liver, and pancreas
Rationale: The accessory organs of the GI system include the salivary glands, liver, gallbladder,
and pancreas. These organs produce secretions that aid in digestion but are not part of the
main digestive tract. The stomach, small intestine, and large intestine are primary organs of the
GI tract. The spleen is part of the lymphatic system.
2. What is the primary function of the gastrointestinal tract?
A. To produce hormones for metabolic regulation
B. To digest food and absorb nutrients into the bloodstream
C. To filter waste products from the blood
D. To regulate body temperature
,Correct Answer: B. To digest food and absorb nutrients into the bloodstream
Rationale: The primary function of the GI tract is to break down ingested food into its
constituent nutrients, which are then absorbed into the bloodstream along with electrolytes,
water, and vitamins. While the GI tract does produce hormones (e.g., gastrin, secretin), this is
not its primary function.
3. Which layer of the gastrointestinal tract is responsible for the peristaltic movements that
propel food through the digestive tract?
A. Mucosa
B. Submucosa
C. Muscularis
D. Serosa
Correct Answer: C. Muscularis
Rationale: The muscularis layer is composed of smooth muscle and is responsible for peristaltic
movements that propel food through the digestive tract. The mucosa is the innermost layer
involved in secretion and absorption, the submucosa contains blood vessels and nerves, and the
serosa is the outermost protective layer.
4. Which of the following correctly describes peristalsis?
A. Rhythmic movements designed to propel chyme along the small intestine toward the large
intestine
B. A mixing movement that churns food in the stomach
, C. The process of chewing food in the mouth
D. The secretion of digestive enzymes
Correct Answer: A. Rhythmic movements designed to propel chyme along the small intestine
toward the large intestine
Rationale: Peristalsis is a unidirectional wave of contraction that propels contents forward
(toward the anus). It is coordinated by the myenteric plexus and moves chyme along the small
intestine toward the large intestine.
5. Which of the following is the primary function of the stomach's pyloric sphincter?
A. To prevent food from entering the trachea
B. To regulate the release of food into the duodenum
C. To absorb nutrients from food
D. To produce hydrochloric acid
Correct Answer: B. To regulate the release of food into the duodenum
Rationale: The pyloric sphincter is a ring of smooth muscle at the junction between the stomach
and the duodenum. It regulates the release of chyme (partially digested food) into the
duodenum at a controlled rate.
6. Which cells in the stomach are responsible for the secretion of hydrochloric acid (HCl)?
A. Chief cells
Pathophysiology | Portage Learning |
2026/2027
1. Which of the following correctly lists the accessory organs of the gastrointestinal system?
A. Stomach, small intestine, and large intestine
B. Salivary glands, liver, and pancreas
C. Esophagus, stomach, and duodenum
D. Gallbladder, appendix, and spleen
Correct Answer: B. Salivary glands, liver, and pancreas
Rationale: The accessory organs of the GI system include the salivary glands, liver, gallbladder,
and pancreas. These organs produce secretions that aid in digestion but are not part of the
main digestive tract. The stomach, small intestine, and large intestine are primary organs of the
GI tract. The spleen is part of the lymphatic system.
2. What is the primary function of the gastrointestinal tract?
A. To produce hormones for metabolic regulation
B. To digest food and absorb nutrients into the bloodstream
C. To filter waste products from the blood
D. To regulate body temperature
,Correct Answer: B. To digest food and absorb nutrients into the bloodstream
Rationale: The primary function of the GI tract is to break down ingested food into its
constituent nutrients, which are then absorbed into the bloodstream along with electrolytes,
water, and vitamins. While the GI tract does produce hormones (e.g., gastrin, secretin), this is
not its primary function.
3. Which layer of the gastrointestinal tract is responsible for the peristaltic movements that
propel food through the digestive tract?
A. Mucosa
B. Submucosa
C. Muscularis
D. Serosa
Correct Answer: C. Muscularis
Rationale: The muscularis layer is composed of smooth muscle and is responsible for peristaltic
movements that propel food through the digestive tract. The mucosa is the innermost layer
involved in secretion and absorption, the submucosa contains blood vessels and nerves, and the
serosa is the outermost protective layer.
4. Which of the following correctly describes peristalsis?
A. Rhythmic movements designed to propel chyme along the small intestine toward the large
intestine
B. A mixing movement that churns food in the stomach
, C. The process of chewing food in the mouth
D. The secretion of digestive enzymes
Correct Answer: A. Rhythmic movements designed to propel chyme along the small intestine
toward the large intestine
Rationale: Peristalsis is a unidirectional wave of contraction that propels contents forward
(toward the anus). It is coordinated by the myenteric plexus and moves chyme along the small
intestine toward the large intestine.
5. Which of the following is the primary function of the stomach's pyloric sphincter?
A. To prevent food from entering the trachea
B. To regulate the release of food into the duodenum
C. To absorb nutrients from food
D. To produce hydrochloric acid
Correct Answer: B. To regulate the release of food into the duodenum
Rationale: The pyloric sphincter is a ring of smooth muscle at the junction between the stomach
and the duodenum. It regulates the release of chyme (partially digested food) into the
duodenum at a controlled rate.
6. Which cells in the stomach are responsible for the secretion of hydrochloric acid (HCl)?
A. Chief cells
