CGRN - Certified Gastroenterology Registered Nurse GI Anatomy and Pathophysiology Questions and Answers

Question 1

A patient with a history of chronic liver disease is being evaluated for complications related to portal hypertension.
Which pathophysiological mechanism is the primary cause of increased pressure in the portal venous system?

Accepted Answer

An increased resistance to blood flow within the cirrhotic liver.

Answer

A decreased production of albumin by the hepatocytes, leading to fluid shifts.

Answer

Splanchnic vasodilation leading to a decrease in systemic blood pressure.

Answer

The formation of extensive portosystemic collateral veins.

Question 2

A nurse is educating a patient newly diagnosed with celiac disease. Which statement accurately describes the underlying pathophysiology of this condition?

Accepted Answer

"Ingestion of gluten triggers an autoimmune response that damages the villi of the small intestine."

Answer

"An allergic reaction to gluten causes the release of histamine, leading to gastric upset."

Answer

"The stomach's parietal cells are unable to produce the intrinsic factor needed to digest gluten."

Answer

"A bacterial enzyme deficiency prevents the breakdown of gluten, leading to fermentation and bloating."

Question 3

The Sphincter of Oddi is a muscular valve that plays a critical role in the digestive process. Which of the following best describes its primary function?

Accepted Answer

To regulate the flow of bile and pancreatic juice into the duodenum.

Answer

To prevent the reflux of colonic contents into the small intestine.

Answer

To control the release of chyme from the stomach into the duodenum.

Answer

To facilitate the absorption of bile salts in the terminal ileum.

Question 4

A patient undergoing an EGD (esophagogastroduodenoscopy) is found to have atrophic gastritis. The nurse understands that this condition primarily affects the function of which cells in the stomach lining?

Accepted Answer

Parietal cells

Answer

Chief cells

Answer

G-cells

Answer

Mucous neck cells

Question 5

Which anatomical structure is responsible for preventing the backflow of bacteria-laden contents from the colon into the small intestine?

Accepted Answer

Ileocecal valve

Answer

Pyloric sphincter

Answer

Sphincter of Oddi

Answer

Ligament of Treitz

Question 6

The vast surface area of the small intestine, critical for nutrient absorption, is primarily achieved through which combination of anatomical features?

Accepted Answer

Plicae circulares, villi, and microvilli

Answer

Haustra, taeniae coli, and omental appendices

Answer

Rugae, gastric pits, and a thick mucus layer

Answer

The greater omentum, lesser omentum, and mesentery