[NSG 120 PATHOPHYSIOLOGY HESI EXAM 1] – QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS
• Cellular Adaptation & Injury
• Inflammation & Immunity
• Fluid, Electrolyte, & Acid-Base Balance
• Genetics & Oncogenesis
• Stress & Disease
• Infection & Epidemiology
• Tissue Repair & Wound Healing
• Pharmacological Principles in Pathophysiology
INTRODUCTION
This comprehensive assessment is designed to rigorously evaluate your foundational understanding of pathophysiology.
It covers key concepts from cellular dysfunction to systemic responses, focusing on the application of theoretical
knowledge to clinical scenarios. The exam emphasizes critical thinking, clinical decision-making, and the integration of
pathophysiological principles to predict, interpret, and manage patient conditions. You will encounter a variety of
question formats, including multiple-choice and complex clinical vignettes, all of which require you to synthesize
information and apply it to real-world professional practice. This is an essential step in preparing for the HESI exam
and ensuring a deep, practical grasp of the subject.
SECTION ONE: QUESTIONS 1-100
,1. A patient presents with chest pain and shortness of breath. An ECG reveals ST-segment elevation. This is most
consistent with which type of cellular injury?
A. Hypoxic injury
B. Free radical injury
C. Chemical injury
D. Physical injury
🟢 A. Hypoxic injury
🔴 Explanation: ST-segment elevation on an ECG is a classic sign of an acute myocardial infarction, which is caused
by ischemia (a form of hypoxic injury). The lack of oxygen to the cardiac muscle cells leads to a cascade of anaerobic
metabolism, ATP depletion, and cellular death.
2. Which of the following is a hallmark of reversible cellular injury?
A. Karyolysis
B. Cellular swelling
C. Pyknosis
D. Karyorrhexis
🟢 B. Cellular swelling
🔴 Explanation: Cellular swelling, or hydropic change, is an early and reversible sign of cellular injury due to the
failure of the sodium-potassium pump. Karyolysis, pyknosis, and karyorrhexis are all indicators of irreversible cell
death (necrosis).
3. A patient has chronic hepatitis C and is at risk for developing hepatocellular carcinoma. This is an example of
which mechanism of cellular adaptation?
A. Atrophy
,B. Hyperplasia
C. Metaplasia
D. Dysplasia
🟢 D. Dysplasia
🔴 Explanation: Chronic inflammation and viral infection can cause repeated cellular replication and DNA damage,
leading to dysplasia, which is the abnormal change in cell size, shape, and organization. Dysplasia is a pre-neoplastic
condition that can progress to cancer.
4. A nurse is teaching a patient about a new medication. The patient asks, "How does this drug work?" Which of
the following is the most appropriate response?
A. It alters the pH of the body's fluids.
B. It binds to receptors to produce a cellular response.
C. It changes the genetic code of the cell.
D. It physically removes the cause of the disease.
🟢 B. It binds to receptors to produce a cellular response.
🔴 Explanation: The fundamental principle of pharmacodynamics is that most drugs exert their effects by binding to
specific receptors (e.g., on cell membranes, within the nucleus) to initiate a cascade of events leading to a
therapeutic effect. This is a foundational concept in pathophysiology and applied pharmacology.
5. A child is diagnosed with cystic fibrosis. The underlying defect involves a mutation in the CFTR gene, affecting
chloride transport. This is an example of a:
A. Chromosomal disorder
B. Single-gene disorder
, C. Multifactorial disorder
D. Mitochondrial disorder
🟢 B. Single-gene disorder
🔴 Explanation: Cystic fibrosis is a classic example of an autosomal recessive single-gene disorder. A mutation in a
single gene (CFTR) is responsible for the disease, unlike chromosomal disorders (e.g., Down syndrome) or
multifactorial disorders which involve multiple genes and environmental factors.
6. A patient with a history of alcohol abuse is admitted with confusion, ataxia, and nystagmus. The nurse
suspects Wernicke-Korsakoff syndrome, which is caused by a deficiency in:
A. Vitamin B12
B. Vitamin C
C. Vitamin B1 (Thiamine)
D. Vitamin D
🟢 C. Vitamin B1 (Thiamine)
🔴 Explanation: Wernicke-Korsakoff syndrome is a neuropsychiatric disorder caused by a severe thiamine (Vitamin
B1) deficiency, often seen in chronic alcoholics. Thiamine is an essential coenzyme for carbohydrate metabolism, and
its deficiency leads to significant neurological dysfunction.
7. A patient's arterial blood gas (ABG) results show: pH 7.32, PaCO2 49 mmHg, and HCO3- 24 mEq/L. The nurse
interprets this as:
A. Metabolic acidosis
B. Metabolic alkalosis
C. Respiratory acidosis
D. Respiratory alkalosis
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS
• Cellular Adaptation & Injury
• Inflammation & Immunity
• Fluid, Electrolyte, & Acid-Base Balance
• Genetics & Oncogenesis
• Stress & Disease
• Infection & Epidemiology
• Tissue Repair & Wound Healing
• Pharmacological Principles in Pathophysiology
INTRODUCTION
This comprehensive assessment is designed to rigorously evaluate your foundational understanding of pathophysiology.
It covers key concepts from cellular dysfunction to systemic responses, focusing on the application of theoretical
knowledge to clinical scenarios. The exam emphasizes critical thinking, clinical decision-making, and the integration of
pathophysiological principles to predict, interpret, and manage patient conditions. You will encounter a variety of
question formats, including multiple-choice and complex clinical vignettes, all of which require you to synthesize
information and apply it to real-world professional practice. This is an essential step in preparing for the HESI exam
and ensuring a deep, practical grasp of the subject.
SECTION ONE: QUESTIONS 1-100
,1. A patient presents with chest pain and shortness of breath. An ECG reveals ST-segment elevation. This is most
consistent with which type of cellular injury?
A. Hypoxic injury
B. Free radical injury
C. Chemical injury
D. Physical injury
🟢 A. Hypoxic injury
🔴 Explanation: ST-segment elevation on an ECG is a classic sign of an acute myocardial infarction, which is caused
by ischemia (a form of hypoxic injury). The lack of oxygen to the cardiac muscle cells leads to a cascade of anaerobic
metabolism, ATP depletion, and cellular death.
2. Which of the following is a hallmark of reversible cellular injury?
A. Karyolysis
B. Cellular swelling
C. Pyknosis
D. Karyorrhexis
🟢 B. Cellular swelling
🔴 Explanation: Cellular swelling, or hydropic change, is an early and reversible sign of cellular injury due to the
failure of the sodium-potassium pump. Karyolysis, pyknosis, and karyorrhexis are all indicators of irreversible cell
death (necrosis).
3. A patient has chronic hepatitis C and is at risk for developing hepatocellular carcinoma. This is an example of
which mechanism of cellular adaptation?
A. Atrophy
,B. Hyperplasia
C. Metaplasia
D. Dysplasia
🟢 D. Dysplasia
🔴 Explanation: Chronic inflammation and viral infection can cause repeated cellular replication and DNA damage,
leading to dysplasia, which is the abnormal change in cell size, shape, and organization. Dysplasia is a pre-neoplastic
condition that can progress to cancer.
4. A nurse is teaching a patient about a new medication. The patient asks, "How does this drug work?" Which of
the following is the most appropriate response?
A. It alters the pH of the body's fluids.
B. It binds to receptors to produce a cellular response.
C. It changes the genetic code of the cell.
D. It physically removes the cause of the disease.
🟢 B. It binds to receptors to produce a cellular response.
🔴 Explanation: The fundamental principle of pharmacodynamics is that most drugs exert their effects by binding to
specific receptors (e.g., on cell membranes, within the nucleus) to initiate a cascade of events leading to a
therapeutic effect. This is a foundational concept in pathophysiology and applied pharmacology.
5. A child is diagnosed with cystic fibrosis. The underlying defect involves a mutation in the CFTR gene, affecting
chloride transport. This is an example of a:
A. Chromosomal disorder
B. Single-gene disorder
, C. Multifactorial disorder
D. Mitochondrial disorder
🟢 B. Single-gene disorder
🔴 Explanation: Cystic fibrosis is a classic example of an autosomal recessive single-gene disorder. A mutation in a
single gene (CFTR) is responsible for the disease, unlike chromosomal disorders (e.g., Down syndrome) or
multifactorial disorders which involve multiple genes and environmental factors.
6. A patient with a history of alcohol abuse is admitted with confusion, ataxia, and nystagmus. The nurse
suspects Wernicke-Korsakoff syndrome, which is caused by a deficiency in:
A. Vitamin B12
B. Vitamin C
C. Vitamin B1 (Thiamine)
D. Vitamin D
🟢 C. Vitamin B1 (Thiamine)
🔴 Explanation: Wernicke-Korsakoff syndrome is a neuropsychiatric disorder caused by a severe thiamine (Vitamin
B1) deficiency, often seen in chronic alcoholics. Thiamine is an essential coenzyme for carbohydrate metabolism, and
its deficiency leads to significant neurological dysfunction.
7. A patient's arterial blood gas (ABG) results show: pH 7.32, PaCO2 49 mmHg, and HCO3- 24 mEq/L. The nurse
interprets this as:
A. Metabolic acidosis
B. Metabolic alkalosis
C. Respiratory acidosis
D. Respiratory alkalosis
