NRS 455 PATHOPHYSIOLOGY EXAM Q & A 2024

NRS 455 Pathophysiology Q & A w/ Rationales 2024 A patient presents with dyspnea, fatigue, and peripheral edema. Which of the following pathophysiological mechanisms is most likely responsible for these symptoms? A. Decreased cardiac output B. Increased systemic vascular resistance C. Hypervolemia D. Pulmonary hypertension Answer: A Rationale: The symptoms described are consistent with heart failure, which is primarily characterized by decreased cardiac output leading to systemic and pulmonary congestion. A patient is diagnosed with type 2 diabetes mellitus. Which of the following pathophysiological processes is primarily responsible for the development of hyperglycemia in this condition? A. Insulin resistance and impaired insulin secretion B. Autoimmune destruction of beta cells C. Deficiency of amylin hormone D. Incre ased glucagon secretion Answer: A Rationale: Type 2 diabetes mellitus is characterized by insulin resistance and impaired insulin secretion, leading to elevated blood glucose levels. A patient presents with severe abdominal pain, nausea, and vomitin g. Laboratory tests reveal elevated serum lipase and amylase. Which of the following pathophysiological conditions is most likely to be responsible for these findings? A. Acute cholecystitis B. Acute pancreatitis C. Peptic ulcer disease D. Inte stinal obstruction Answer: B Rationale: Elevated serum lipase and amylase levels are indicative of pancreatic injury, which is a hallmark of acute pancreatitis. A patient presents with joint pain, stiffness, and swelling, particularly in the small j oints of the hands. Which of the following pathophysiological processes is most likely responsible for these symptoms? A. Synovial inflammation and hyperplasia B. Cartilage degradation and bone erosion C. Immune complex deposition in the joints D. Dysregulation of cytokine signaling Answer: A Rationale: The described symptoms are consistent with the inflammatory process of rheumatoid arthritis, characterized by synovial inflammation and hyperplasia. A patient with a history of chronic kidney disease presents with elevated serum potassium levels. Which of the following pathophysiological mechanisms is most likely responsible for this finding? A. Decreased renal potassium excretion B. Excessive di etary intake of potassium -rich foods C. Altered potassium distribution between intracellular and extracellular compartments D. Impaired potassium uptake by skeletal muscles Answer: A Rationale: In chronic kidney disease, the impaired renal function leads to decreased potassium excretion, resulting in elevated serum potassium levels. A patient presents with sudden -onset vision changes, including floaters and flashes of light. Which of the following pathophysiological conditions should be suspect ed in this patient? A. Retinal detachment B. Glaucoma C. Macular degeneration D. Optic neuritis Answer: A Rationale: The described symptoms are consistent with the clinical presentation of retinal detachment, which requires prompt medical attention to prevent permanent vision loss. A patient with a history of liver cirrhosis presents with ascites, jaundice, and coagulopathy. Which of the following pathophysiological mechanisms is most likely responsible for these findings?