HESI RN ADVANCED PATHOPHYSIOLOGY FINAL EXAM STUDY GUIDE – 200 PRACTICE QUESTIONS, DETAILED RATIONALES, AND CORRECT ANSWERS COVERING IMMUNITY, INFLAMMATION, ACID-BASE, ORGAN FAILURE, AUTOIMMUNE DISEASES, AND MORE (A+ GRADE GUARANTEED)

HESI RN ADVANCED PATHOPHYSIOLOGY FINAL EXAM STUDY GUIDE – 200 PRACTICE QUESTIONS, DETAILED RATIONALES, AND CORRECT ANSWERS COVERING IMMUNITY, INFLAMMATION, ACID-BASE, ORGAN FAILURE, AUTOIMMUNE DISEASES, AND MORE (A+ GRADE GUARANTEED) 1. A patient with chronic emphysema exhibits increased anteroposterior chest diameter, use of accessory muscles, and prolonged expiration. Which pathophysiological change is most responsible for these findings? a. Increased surfactant production b. Loss of elastic recoil and airway collapse during expiration c. Thickening of the alveolar-capillary membrane d. Pulmonary artery vasodilation Correct Answer: b. Loss of elastic recoil and airway collapse during expiration Rationale: In emphysema, destruction of alveolar walls and loss of elastic fibers reduce elastic recoil, causing airways to collapse during expiration and leading to air trapping, barrel chest, and use of accessory muscles. 2. A patient with chronic kidney disease has a serum potassium of 6.8 mEq/L, muscle weakness, and peaked T waves on ECG. Which of the following best explains the cellular mechanism of these findings? a. Increased intracellular potassium shift due to aldosterone excess b. Decreased renal excretion of potassium with impaired Na+/K+ ATPase function c. Enhanced sodium-potassium pump activity leading to hyperpolarization d. Increased gastrointestinal potassium loss Correct Answer: b. Decreased renal excretion of potassium with impaired Na+/K+ ATPase function Rationale: In chronic kidney disease, reduced glomerular filtration decreases potassium excretion. Hyperkalemia alters the resting membrane potential, causing muscle weakness and cardiac conduction changes (peaked T waves). 3. Which immunoglobulin is primarily responsible for the secondary immune response and provides long-term immunity? a. IgA b. IgM c. IgG d. IgE Correct Answer: c. IgG Rationale: IgG is the most abundant immunoglobulin and is produced during the secondary immune response. It provides long-term immunity, crosses the placenta, and opsonizes pathogens. 4. A patient with liver cirrhosis develops ascites and esophageal varices. Which of the following is the primary mechanism leading to these complications? a. Decreased plasma oncotic pressure and increased portal pressure b. Increased aldosterone secretion and sodium retention c. Hepatic artery vasodilation and increased cardiac output d. Biliary obstruction and bile salt accumulation Correct Answer: a. Decreased plasma oncotic pressure and increased portal pressure Rationale: Cirrhosis leads to portal hypertension from increased resistance to portal blood flow and hypoalbuminemia from reduced hepatic synthesis, decreasing plasma oncotic pressure. These combined mechanisms drive fluid into the peritoneal cavity (ascites) and cause collateral vessel formation (esophageal varices). 5. A patient who received a kidney transplant from a non-identical sibling is taking immunosuppressants to prevent graft rejection. This type of transplant is classified as: a. Autologous transplant b. Syngeneic transplant c. Allogenic transplant d. Xenogeneic transplant Correct Answer: c. Allogenic transplant Rationale: An allogenic transplant involves tissue or organs transferred between genetically non-identical members of the same species. A transplant from a sibling who is not an identical twin is allogenic. 6. A patient with systemic lupus erythematosus (SLE) develops a malar rash, joint pain, and proteinuria. The underlying pathophysiologic abnormality in SLE is: a. Type I hypersensitivity reaction b. Autoimmunity with formation of immune complexes c. Immunodeficiency with recurrent infections d. Uncontrolled B-cell proliferation Correct Answer: b. Autoimmunity with formation of immune complexes Rationale: SLE is a systemic autoimmune disease characterized by loss of self-tolerance and production of autoantibodies against nuclear antigens. Immune complex deposition in tissues (skin, kidneys, joints) leads to inflammation and tissue damage. 7. A patient with a traumatic brain injury develops diabetes insipidus. Which of the following laboratory findings would the nurse expect? a. Serum sodium 130 mEq/L, urine osmolality 800 mOsm/kg b. Serum sodium 155 mEq/L, urine osmolality 150 mOsm/kg c. Serum sodium 140 mEq/L, urine osmolality 600 mOsm/kg d. Serum sodium 120 mEq/L, urine osmolality 100 mOsm/kg Correct Answer: b. Serum sodium 155 mEq/L, urine osmolality 150 mOsm/kg Rationale: Diabetes insipidus results from deficient antidiuretic hormone (ADH) or renal resistance to ADH. The kidneys cannot concentrate urine, leading to large volumes of dilute urine (low osmolality) and hypernatremia (elevated serum sodium) from excessive free water loss. 8. A patient with heart failure has elevated jugular venous pressure, hepatomegaly, and peripheral edema. These findings are primarily due to: a. Decreased cardiac output and renal hypoperfusion b. Increased systemic vascular resistance c. Right-sided heart failure with increased venous pressure d. Left ventricular hypertrophy and decreased compliance Correct Answer: c. Right-sided heart failure with increased venous pressure Rationale: Right-sided heart failure impairs the right ventricle's ability to pump blood into the pulmonary circulation, leading to increased systemic venous pressure. This causes jugular venous distention, hepatomegaly (congestive hepatopathy), and peripheral edema. 9. A patient's laboratory report shows a "shift to the left" on the white