HESI Pathophysiology 2026-2027 with
correct answers updated
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 Answers b)
chronic inflammation and bronchoconstriction of the airways
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 Answers a) hyperglycemia-
induced osmotic diuresis
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 Answers b) sympathetic nervous system stimulation
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 Answers a)
autoimmune destruction of joint cartilage and synovial membrane
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 Answers a)
destruction of alveoli and loss of lung elasticity
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 Answers a) blockage of
cerebral blood vessels by a thrombus or embolus
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 Answers d) progressive
loss of nephrons and renal function over time
,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 Answers b) impaired glucose uptake by
peripheral tissues
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
Answers c) chronic inflammation and infection with H. pylori
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 Answers a) accumulation of
amyloid plaques and neurofibrillary tangles in the brain
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 Answers c)
mutations in the CFTR gene leading to defective chloride ion transport
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 Answers 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 Answers a) excessive
production of parathyroid hormone leading to bone reabsorption
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 Answers a) blockage
of coronary arteries by atherosclerotic plaques
What is the primary pathophysiological mechanism underlying Type 1 diabetes mellitus?
a) Insulin resistance in peripheral tissues
correct answers updated
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 Answers b)
chronic inflammation and bronchoconstriction of the airways
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 Answers a) hyperglycemia-
induced osmotic diuresis
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 Answers b) sympathetic nervous system stimulation
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 Answers a)
autoimmune destruction of joint cartilage and synovial membrane
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 Answers a)
destruction of alveoli and loss of lung elasticity
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 Answers a) blockage of
cerebral blood vessels by a thrombus or embolus
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 Answers d) progressive
loss of nephrons and renal function over time
,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 Answers b) impaired glucose uptake by
peripheral tissues
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
Answers c) chronic inflammation and infection with H. pylori
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 Answers a) accumulation of
amyloid plaques and neurofibrillary tangles in the brain
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 Answers c)
mutations in the CFTR gene leading to defective chloride ion transport
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 Answers 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 Answers a) excessive
production of parathyroid hormone leading to bone reabsorption
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 Answers a) blockage
of coronary arteries by atherosclerotic plaques
What is the primary pathophysiological mechanism underlying Type 1 diabetes mellitus?
a) Insulin resistance in peripheral tissues
