Certification Exam Practice Test

Certified Gastroenterology Nurse Certification Exam Practice Test Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following is the primary function of the small intestine?
• Water absorption
• Nutrient absorption
• Bile production
• Blood filtration

Rationale: The small intestine is responsible for most nutrient absorption

through villi and microvilli that increase surface area.

• Which section of the GI tract is most responsible for water absorption?
• Stomach
• Small intestine 1 / 4

• Large intestine
• Esophagus

Rationale: The large intestine absorbs most of the water and electrolytes

from indigestible food matter.

• A colonoscopy is typically performed for which of the following

indications?

• Dysphagia
• Upper GI bleeding
• Screening for colorectal cancer
• Peptic ulcer disease

Rationale: Colonoscopy allows visualization of the colon to detect polyps,

cancers, or sources of lower GI bleeding.

• Which of the following medications is commonly used for bowel

preparation before colonoscopy?

• Famotidine
• Omeprazole
• Polyethylene glycol (PEG)
• Sucralfate

Rationale: Polyethylene glycol is an osmotic laxative that effectively cleanses

the bowel before endoscopic procedures. 2 / 4

• During an upper endoscopy, which of the following structures can be

visualized?

• Colon and rectum
• Esophagus, stomach, and duodenum
• Ileum and cecum
• Sigmoid colon only

Rationale: An esophagogastroduodenoscopy (EGD) allows examination of

the esophagus, stomach, and duodenum.

• A patient develops bradycardia during an endoscopy. The nurse should

first:

• Call the physician
• Administer oxygen
• Stop the procedure and assess vital signs
• Give atropine immediately

Rationale: Assessment is the first nursing action when complications occur;

the procedure should be stopped and vital signs checked.

• What is the most common cause of upper GI bleeding?
• Diverticulosis
• Hemorrhoids 3 / 4

• Peptic ulcer disease
• Colon cancer

Rationale: Peptic ulcers are the leading cause of upper gastrointestinal

bleeding due to mucosal erosion.

• Which condition is characterized by inflammation of the liver?
• Pancreatitis
• Hepatitis
• Cholelithiasis
• Gastritis

Rationale: Hepatitis refers to liver inflammation caused by viruses, alcohol,

or toxins.

• A nurse prepares to administer a suppository. The appropriate position

for the patient is:

• Supine
• Left lateral (Sim’s) position
• Prone
• Sitting upright

Rationale: The left lateral position facilitates easy insertion into the rectum

and promotes proper placement.

• / 4