- | P a g e
HESI Pathophysiology 2025-2026 Questions And Correct Detailed Answers (Verified Answers) Already Graded A+ TESTBANK
- What is the primary pathophysiological mechanism underlying Alzheimer's
disease?
a) Accumulation of amyloid plaques and neurofibrillary tangles in the brain
b) Degeneration of motor neurons in the spinal cord
c) Impaired transmission of acetylcholine at the neuromuscular junction
d) Blockage of cerebral blood vessels by thrombi or emboli
Correct Answer: a) Accumulation of amyloid plaques and neurofibrillary tangles in the brain
- Which of the following pathophysiological mechanisms is associated with the
development of peptic ulcer disease?
a) Excessive production of gastric acid by parietal cells
b) Impaired mucosal blood flow leading to ischemia
c) Chronic inflammation and infection with Helicobacter pylori
d) Dysfunction of the lower esophageal sphincter allowing reflux of gastric contents
Correct Answer: c) Chronic inflammation and infection with Helicobacter pylori
- In a patient with type 2 diabetes mellitus, which of the following pathophysiological
changes is primarily responsible for insulin resistance?
a) Decreased secretion of insulin by pancreatic beta cells
b) Impaired glucose uptake by peripheral tissues
c) Hyperglycemia-induced inhibition of insulin receptor signaling
d) Dysregulation of hepatic glucose production
Correct Answer: b) Impaired glucose uptake by peripheral tissues
- | P a g e
- Which of the following pathophysiological mechanisms is responsible for the
development of chronic kidney disease (CKD)?
a) Glomerular hyperfiltration and hypertrophy
b) Immune-mediated destruction of renal tubules
c) Obstruction of urinary flow due to kidney stones
d) Progressive loss of nephrons and renal function over time
Correct Answer: d) Progressive loss of nephrons and renal function over time
- What is the primary pathophysiological mechanism underlying ischemic stroke?
a) Blockage of cerebral blood vessels by a thrombus or embolus
b) Rupture of cerebral blood vessels leading to hemorrhage
c) Impaired cerebral perfusion due to systemic hypotension
d) Compression of cerebral tissue by a tumor or hematoma
Correct Answer: a) Blockage of cerebral blood vessels by a thrombus or embolus
- Which of the following pathophysiological changes is characteristic of chronic
obstructive pulmonary disease (COPD)?
a) Destruction of alveoli and loss of lung elasticity
b) Inflammation and scarring of the pleura
c) Increased production of surfactant in the lungs
d) Constriction of bronchioles due to smooth muscle hypertrophy
Correct Answer: a) Destruction of alveoli and loss of lung elasticity
- What is the primary pathophysiological mechanism underlying rheumatoid
arthritis?
a) Autoimmune destruction of joint cartilage and synovial membrane
b) Degeneration of articular cartilage due to mechanical stress
c) Accumulation of uric acid crystals in the joints
d) Excessive production of synovial fluid leading to joint effusion
Correct Answer: a) Autoimmune destruction of joint cartilage and synovial membrane
- | P a g e
- In a patient with congestive heart failure, which of the following pathophysiological
changes is most likely to occur initially as a compensatory mechanism?
a) Activation of the renin-angiotensin-aldosterone system (RAAS)
b) Sympathetic nervous system stimulation
c) Ventricular hypertrophy
d) Pulmonary vasoconstriction
Correct Answer: b) Sympathetic nervous system stimulation
- A patient with diabetes mellitus is experiencing polyuria, polydipsia, and
polyphagia. Which of the following pathophysiological mechanisms is primarily responsible for these symptoms?
a) Hyperglycemia-induced osmotic diuresis
b) Decreased insulin production by the pancreas
c) Insulin resistance at the cellular level
d) Glycosylation of proteins leading to tissue damage
Correct Answer: a) Hyperglycemia-induced osmotic diuresis
- Which of the following best describes the pathophysiology of asthma?
a) Excessive mucus production in the airways leading to obstruction
b) Chronic inflammation and bronchoconstriction of the airways
c) Destruction of alveoli and decreased lung elasticity
d) Thickening and scarring of lung tissue leading to reduced compliance
Correct Answer: b) Chronic inflammation and bronchoconstriction of the airways
- What is the primary cause of cystic fibrosis?
a) Autoimmune destruction of pancreatic beta cells
b) Excessive production of mucus by bronchial glands
c) Mutations in the CFTR gene leading to defective chloride ion transport
d) Chronic exposure to tobacco smoke and environmental pollutants
Correct Answer: c) Mutations in the CFTR gene leading to defective chloride ion transport
- | P a g e
- What is the primary pathophysiological mechanism underlying Parkinson's
disease?
a) Degeneration of dopaminergic neurons in the substantia nigra of the brain
b) Impaired transmission of serotonin in the spinal cord
c) Accumulation of tau protein aggregates in the cerebral cortex
d) Blockage of cerebral blood vessels by atherosclerotic plaques
Correct Answer: a) Degeneration of dopaminergic neurons in the substantia nigra of the brain
- Which of the following pathophysiological mechanisms is associated with the
development of osteoporosis?
a) Excessive production of parathyroid hormone leading to bone resorption
b) Decreased synthesis of collagen by osteoblasts
c) Impaired blood supply to bone tissues causing necrosis
d) Chronic inflammation of the synovial membrane in the joints
Correct Answer: a) Excessive production of parathyroid hormone leading to bone
resorption
- What is the primary pathophysiological mechanism underlying myocardial
infarction?
a) Blockage of coronary arteries by atherosclerotic plaques
b) Impaired electrical conduction in the myocardium
c) Chronic hypertension leading to left ventricular hypertrophy
d) Dysfunction of heart valves resulting in regurgitation of blood
Correct Answer: a) Blockage of coronary arteries by atherosclerotic plaques
- What is the primary pathophysiological mechanism underlying Type 1 diabetes
mellitus?
