GERD, peptic ulcer disease and gastritis compared
Normal acid physiology first, then the three disorders as departures from it — and remember the constraint that your patient factor must differ from the one you used in the same week's discussion.
Editorial process
Last reviewed · August 15, 2026
Three disorders, one patient factor, one mind map
Build the paper on normal physiology, because all three disorders are departures from it and the assignment tells you to start there. Gastric acid secretion is driven by three stimuli acting on the parietal cell — gastrin, histamine at the H2 receptor, and acetylcholine through vagal input — with the proton pump as the final common step, which is why proton pump inhibitors outperform H2 blockers. Protection comes from the mucus and bicarbonate layer, mucosal blood flow and prostaglandin-mediated repair. Every one of the three disorders is a failure of the balance between those two sides, and saying that explicitly gives the comparison a spine. In GERD the problem is not acid quantity but containment: lower oesophageal sphincter incompetence and transient relaxations expose squamous mucosa that has none of the stomach's defences, which is why the same acid that the stomach tolerates produces injury a few centimetres higher up and why reducing acid works even though acid was never the abnormality.
Peptic ulcer disease and gastritis are both defence failures rather than acid excess, and the two dominant causes are Helicobacter pylori and non-steroidal anti-inflammatory drugs — the first through urease-mediated colonisation and inflammation, the second by inhibiting the prostaglandins that maintain mucosal protection. Gastritis is inflammation without the mucosal breach that defines an ulcer, which is the cleanest way to distinguish them. Note the similarities the assignment asks for as well as the differences: all three present with upper abdominal symptoms that overlap, all three are affected by the same treatments, and all three require alarm features to be excluded before empirical treatment. Then the patient factor, and read the constraint carefully — it must be different from the one you used in this week's discussion. Take it through pathophysiology, diagnosis and treatment for each of the three disorders, and use the mind map resource the assignment names to structure the presentation.
Likely learning objectives
Inferred from the brief — check these against your own rubric.
- 01Explain normal gastric acid stimulation as the baseline the three disorders depart from.
- 02Distinguish a containment failure from a mucosal defence failure.
- 03Separate gastritis from ulceration by the presence of a mucosal breach.
- 04Apply one patient factor across pathophysiology, diagnosis and treatment for all three.
Read the full question
Review every instruction before using the planning guidance that follows.
Turn the brief into deliverables
- 01An account of normal acid stimulation and mucosal protection.
- 02Pathophysiology of GERD, peptic ulcer disease and gastritis.
- 03Similarities and differences between the three.
- 04A patient factor, different from your discussion choice, applied throughout.
- 05A mind map as directed, with APA citations.
Acid physiology, the three disorders, then the factor
Normal acid stimulation and protection
Set out gastrin, histamine and vagal stimulation against mucus, bicarbonate and prostaglandins.
GERD as a containment failure
Explain sphincter incompetence and the vulnerability of oesophageal mucosa.
Ulcer and gastritis as defence failures
Cover Helicobacter pylori and NSAIDs, and distinguish inflammation from breach.
Similarities and differences
Compare presentation, investigation and treatment across the three.
The patient factor applied
Take the chosen factor through pathophysiology, diagnosis and treatment for each disorder.
Sources for GERD, PUD and gastritis
Recommended databases
- NCBI Bookshelf (StatPearls)
- PubMed Central
- Your Huether and McCance chapters 35 and 37
- The week's mind map media
Search sequence
- 1.Read the assigned chapters first, then use a reference source for the receptor-level detail textbooks compress.
- 2.Check current Helicobacter pylori eradication regimens, which have changed with resistance.
- 3.Search your chosen patient factor against each of the three disorders separately, since the effects differ.
- 4.Review the mind map media before building the presentation, since the format is specified.
Reference shortlist
These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.
Nothing here is cleared for citation until you have read it.
- 01
Gastroesophageal Reflux Disease (GERD)
StatPearls, NCBI Bookshelf · 2023
Mechanism, diagnosis and treatment of reflux, including why it is a containment rather than a secretion problem.
- 02
Peptic Ulcer Disease
StatPearls, NCBI Bookshelf · 2023
Helicobacter pylori and NSAID mechanisms and the current treatment approach for ulceration.
- 03
Extraintestinal Manifestations of Inflammatory Bowel Disease
StatPearls, NCBI Bookshelf · 2023
Extraintestinal and systemic considerations, useful when the patient factor is age or comorbidity.
- 04
Evidence-Based Medicine
StatPearls, NCBI Bookshelf · 2024
Frames how strongly the evidence supports empirical treatment against investigation, which the diagnosis leg needs.
Review before submission
Common mistakes
- Explaining all three as excess acid, which misdescribes GERD and both defence failures.
- Using the same patient factor as the week's discussion, which the assignment forbids.
- Treating gastritis and ulcer as the same condition at different severities.
- Omitting the similarities, which the assignment asks for alongside the differences.
- Applying the patient factor to pathophysiology only and not to diagnosis or treatment.
Submission checklist
- Does the paper start from normal acid physiology?
- Is GERD explained as containment rather than quantity?
- Are gastritis and ulcer distinguished by mucosal breach?
- Is your patient factor different from the discussion one?
- Does the factor cover pathophysiology, diagnosis and treatment for all three?
Use this guide to plan and review your own work. Follow your institution's rules and read our academic-integrity policy.
Written by
Aaron Bishop
MA, Education
assignment interpretation and research-methods coaching across disciplines
Aaron leads the EssayCrackers editorial desk. He works on how assignment briefs are read — what a rubric is actually asking for, and where students most often answer a different question than the one set.
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Dr. Nathan Cole
PhD, Rhetoric & Composition
Argumentation and thesis development
Nathan teaches first-year composition and directs a university writing center. He reviews EssayCrackers guides for argumentative soundness and citation accuracy.