A patient with a history of PUD is started on a proton pump inhibitor (PPI) and asks why this medication is necessary. The nurse's best response is:

Correct Answer: C

Rationale: PPIs reduce acid production, aiding ulcer healing.

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.

Correct Answer: B

Rationale: The digestive system processes organic molecules (carbohydrates, proteins, fats) into smaller units that can be absorbed and enter cells for energy, growth, or repair. Waste removal is excretory. Glucose breakdown occurs in cells, not digestion. Amino acid conversion is synthetic, not digestive.

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 .

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.