WGU D115 Advanced Pathophysiology | Unit 6 Gastrointestinal & Renal Study Guide | 2026 Edition

Master the complex clinical concepts of WGU D115 Advanced Pathophysiology with this targeted Unit 6 study guide, updated for 2026. This resource focuses on the gastrointestinal and renal systems, providing verified answers for the most challenging topics on the Objective Assessment. You will find detailed explanations of gastric cell functions—specifically parietal and chief cells—and the role of enzymes like amylase, lipase, and pepsin in digestion. The guide also breaks down complex pathological mechanisms for disorders such as Crohn’s disease, GERD, and SIADH, including electrolyte imbalances like hyponatremia. With additional coverage of the icteric phase of Hepatitis B and essential clinical reference ranges for BUN, Creatinine, and GFR, this guide offers the technical precision and advanced medical clarity required for graduate-level nursing success.