ATI LPN
Upper Gastrointestinal System NCLEX Questions Questions
Question 1 of 5
False-negative direct urease tests for Helicobacter pylori are: ( Select one that does not apply)
Correct Answer: A
Rationale: After proton pump inhibitor and antibiotic therapy it is best to wait a month before repeat endoscopy for gastric biopsy and urease testing. The same is true of the urea breath test which is a convenient noninvasive alternative. A urease test at the time of haematemesis will usually be negative. Even after definite eradication of Helicobacter pylori, serology will remain positive for months. ELISA testing would confirm a true positive urease test.
Question 2 of 5
In an autotrophic organism, substance B functions as a
Correct Answer: A
Rationale: In autotrophs (e.g., plants), substance B (likely glucose from photosynthesis diagrams) is a source of energy for cellular processes. It's not a hormone , vitamin , or vague biotic resource .
Question 3 of 5
Digestion takes place in a long tube-like canal called the alimentary canal, or the digestive tract. Food travels through these organs in the following order:
Correct Answer: A
Rationale: The correct digestive order is mouth, gullet (esophagus), stomach, small intestine, large intestine, rectum, making A correct. B reverses small/large intestine, C misplaces esophagus, and D misorders stomach and gullet.
Question 4 of 5
If sodium bicarbonate (NaHCO3) is not released as part of the pancreatic juice, the pH of the
Correct Answer: D
Rationale: Sodium bicarbonate neutralizes acidic chyme in the small intestine; without it, the small intestine remains acidic, making D correct.
Question 5 of 5
Which of the following is an effect of gastric secretions on digestion?
Correct Answer: D
Rationale: Gastric secretions include pepsin, which breaks proteins into peptides, making D correct.