WGU D115 Advanced Pathophysiology (2026) – 185 Questions on Neurologic, Endocrine, Renal, Cardiovascular & Immune Disorders

This document contains approximately 185 comprehensive exam-style questions with verified answers for WGU D115 Advanced Pathophysiology (2026). The content provides extensive system-based coverage of neurologic, endocrine, renal, cardiovascular, hematologic, respiratory, immune, dermatologic, and gastrointestinal disorders. Early sections (pages 1–6) review neurologic assessment tools such as the Glasgow Coma Scale (GCS 3–15; severe TBI 3–8), psychiatric disorders including schizophrenia and generalized anxiety disorder, and ENT infections such as acute otitis media and peritonsillar abscess. Endocrine disorders are introduced with Graves’ disease, insulin resistance (triglycerides 150 mg/dL), type 1 vs type 2 diabetes mellitus, and disorders of puberty and reproductive health including Turner syndrome, PCOS, and genetic counseling indications (pages 2–4). Renal and cardiovascular pathophysiology are thoroughly addressed (pages 7–16), including hypertension diagnosis criteria, left-sided heart failure manifestations (S3, basilar crackles, dyspnea), electrolyte imbalances, prerenal/intrarenal/postrenal acute kidney injury, stage 3 CKD (GFR 42), azotemia, nephrotic syndrome, and glomerulonephritis confirmed by renal biopsy. Hematologic content includes sickle cell disease and trait, leukemia (CLL, AML), pancytopenia, tumor lysis syndrome, pernicious anemia, vitamin B12 deficiency neurologic symptoms, and erythropoietin suppression in renal disease (pages 8–10, 23–24). Respiratory and immune system disorders are extensively reviewed (pages 5, 17, 32–35), including ARDS (bilateral infiltrates, decreased compliance), asthma (IgE-mediated inflammation and airway remodeling), COPD, cystic fibrosis (defective chloride channels and thick mucus), SIRS, MODS, septic shock, anaphylactic shock, and active-acquired immunity. Dermatologic and infectious disease topics include herpes zoster, atopic dermatitis, actinic keratosis, toxic shock syndrome, Kawasaki disease (strawberry tongue), measles (Koplik spots), ocular herpes (fern-like fluorescein pattern), and acute bacterial rhinosinusitis (pages 10–12, 31–37). Advanced endocrine disorders are comprehensively covered (pages 18–22), including SIADH (water retention, hyponatremia), diabetes insipidus (ADH deficiency, hypernatremia), Cushing’s disease, Addison’s disease, hyperpituitarism, and hypopituitarism. Gastrointestinal and hepatic conditions include hepatic encephalopathy (staged cognitive decline), lactulose therapy, chronic gastritis, small and large bowel obstruction, and cholecystitis (pages 29–30). Musculoskeletal and rheumatologic conditions such as osteoporosis, fibromyalgia, osteoarthritis (joint space narrowing), elevated CRP and ANA, and Trendelenburg gait are also detailed (pages 11–13, 30–31). The structured question-and-answer format mirrors WGU D115 Objective Assessment standards and strengthens integration of pathophysiologic mechanisms, clinical manifestations, laboratory interpretation, and diagnostic reasoning across body systems. This resource is particularly relevant for: WGU D115 Advanced Pathophysiology students RN-to-BSN and MSN students Nurse Practitioner (FNP, PMHNP, AGNP) students Advanced Health Assessment and Pathophysiology courses APRN board exam preparation Students reviewing multi-system disease mechanisms Keywords: WGU D115 Advanced Pathophysiology 2026, Glasgow Coma Scale severe TBI 3 to 8, SIADH vs diabetes insipidus, prerenal intrarenal postrenal acute kidney injury, stage 3 chronic kidney disease GFR 42, nephrotic syndrome frothy urine, sickle cell disease trait malaria protection, tumor lysis syndrome hyperkalemia hyperphosphatemia, ARDS bilateral infiltrates decreased compliance, cystic fibrosis defective chloride channel, IgE mediated asthma airway remodeling, Cushing disease hypercortisolism, Addison disease adrenal insufficiency, left sided heart failure S3 basilar crackles, Takotsubo cardiomyopathy stress induced, Kawasaki disease strawberry tongue, hepatic encephalopathy lactulose ammonia removal, pernicious anemia intrinsic factor deficiency, retinoblastoma chromosome 13q14, actinic keratosis precancerous lesion