NR507/NR 507 Midterm Exam (Latest 2025/2026 Update) – Advanced Pathophysiology | Questions and Verified Answers | 100% Correct | Grade A – Chamberlain Introduction This document provides verified and 100% correct questions and answers from the NR507/NR 507 Midterm Exam at Chamberlain University, fully updated for the 2025/2026 academic year. Designed for APRN, MSN, and NP students enrolled in Advanced Pathophysiol- ogy, it includes detailed rationales to support deeper clinical understanding and ensure success in mastering complex pathophysiological concepts.Exam Questions and Answers 1.[Cardiovascular and Hematologic]What is the primary mechanism of atheroscle- rosis?A.Endothelial injury and plaque formation B.Smooth muscle hypertrophy C.Vasospasm D.Thrombocytopenia Rationale:Endothelial injury triggers inflammation and lipid accumulation, forming atherosclerotic plaques, which narrow arteries and impair blood flow.
2.[Pulmonary and Renal]What is the primary cause of pulmonary edema in heart failure?A.Increased pulmonary capillary pressure B.Decreased surfactant production C.Bronchial constriction D.Alveolar macrophage activation Rationale:Left heart failure elevates pulmonary capillary pressure, forcing fluid into alveoli, causing pulmonary edema and dyspnea.
3.[Neurological and Endocrine]What is the primary cause of diabetic ketoacidosis
(DKA)?
NR507 Midterm | Chamberlain University | 100% Verified with Rationales | 2025/2026 1 / 3
A.Insulin deficiency B.Glucagon deficiency C.Cortisol excess D.Thyroxine excess Rationale:Insulin deficiency leads to uncontrolled lipolysis and ketogenesis, resulting in acidosis and ketone accumulation in DKA.
4.[Immune and Inflammatory]What is the hallmark of systemic lupus erythe- matosus (SLE)?A.Autoantibody production against nuclear antigens B.Elevated C-reactive protein C.Monoclonal gammopathy D.Neutrophil extracellular traps Rationale:SLE is characterized by autoantibodies, particularly anti-nuclear antibodies, causing widespread tissue damage and inflammation.
5.[Gastrointestinal and Hepatic]What is the primary mechanism of hepatic en- cephalopathy in cirrhosis?A.Ammonia accumulation in the brain B.Bile acid deficiency C.Hypoglycemia D.Portal vein thrombosis Rationale:Cirrhosis impairs ammonia detoxification, leading to its accumulation, which disrupts neurological function.
6.[Cardiovascular and Hematologic]What is the primary cause of myocardial infarction?A.Coronary artery occlusion B.Aortic dissection C.Pulmonary embolism D.Pericardial effusion Rationale:Coronary artery occlusion, typically by a thrombus, causes myocardial is- chemia and infarction.
7.[Pulmonary and Renal]Which electrolyte imbalance is most common in acute kidney injury (AKI)?A.Hypokalemia B.Hyperkalemia C.Hyponatremia D.Hypocalcemia NR507 Midterm | Chamberlain University | 100% Verified with Rationales | 2025/2026 2 / 3
Rationale:AKI impairs potassium excretion, leading to hyperkalemia, which can cause cardiac arrhythmias.
8.[Neurological and Endocrine]What is the primary pathophysiological feature of Parkinson’s disease?A.Dopamine depletion in the substantia nigra B.Amyloid plaque formation C.Myelin sheath destruction D.Glutamate excitotoxicity Rationale:Loss of dopaminergic neurons in the substantia nigra reduces dopamine, causing motor symptoms in Parkinson’s.
9.[Immune and Inflammatory]What is the primary mechanism of type I hyper- sensitivity reactions?A.IgE-mediated mast cell activation B.Immune complex deposition C.T-cell cytotoxicity D.Complement-mediated lysis Rationale:IgE binds allergens, triggering mast cell degranulation and histamine release in type I reactions like anaphylaxis.
10.[Gastrointestinal and Hepatic]What is the primary cause of peptic ulcer dis- ease?A.Helicobacter pylori infection B.Stress-induced acid production C.Bile reflux D.Pancreatic enzyme deficiency Rationale:H. pylori disrupts the gastric mucosa, increasing acid damage and ulcer formation.
11.[Cardiovascular and Hematologic]What is the primary cause of cardiogenic shock?A.Decreased cardiac output B.Hypovolemia C.Sepsis D.Anaphylaxis Rationale:Impaired heart function reduces cardiac output, leading to systemic hypop- erfusion in cardiogenic shock.
12.[Pulmonary and Renal]What is the primary cause of acute respiratory distress syndrome (ARDS)?NR507 Midterm | Chamberlain University | 100% Verified with Rationales | 2025/2026
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