COMLEX LEVEL 1 LAST-MINUTE REVIEW GUIDE – QUESTIONS
AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS
• Osteopathic Principles and Practice (OPP)
• Anatomy
• Physiology
• Biochemistry
• Microbiology
• Pathology
• Pharmacology
• Behavioral Science and Ethics
,• Neurology
• Systems-Based Clinical Integration
INTRODUCTION
This assessment is designed as a comprehensive last-minute review
for COMLEX Level 1 candidates. It evaluates foundational biomedical
sciences, osteopathic principles, clinical reasoning, and the
integration of scientific knowledge into patient care. Questions
include traditional multiple-choice items and scenario-based clinical
applications that mirror examination expectations. Emphasis is
placed on diagnostic reasoning, pathophysiology, pharmacology,
anatomy, ethics, and osteopathic manipulative medicine concepts.
The assessment encourages real-world decision-making and
reinforces high-yield topics frequently tested across multiple
disciplines. Detailed explanations accompany each answer to support
rapid review and strengthen conceptual understanding before
examination day.
SECTION ONE (QUESTIONS 1–50)
, 1. Which cranial nerve is responsible for facial expression?
A. Trigeminal nerve
B. Facial nerve
C. Glossopharyngeal nerve
D. Vagus nerve
🟢 Correct Answer: B. Facial nerve
🔴 Explanation: The facial nerve (CN VII) innervates the muscles of
facial expression.
2. A patient develops hyperglycemia due to insulin deficiency.
Which organ produces insulin?
A. Pancreas
B. Liver
C. Spleen
D. Adrenal gland
🟢 Correct Answer: A. Pancreas
🔴 Explanation: Beta cells of the pancreatic islets produce insulin.
3. Which neurotransmitter is deficient in Parkinson disease?
, A. Serotonin
B. GABA
C. Dopamine
D. Acetylcholine
🟢 Correct Answer: C. Dopamine
🔴 Explanation: Degeneration of substantia nigra neurons leads to
dopamine deficiency.
4. The primary function of red blood cells is:
A. Clot formation
B. Immune defense
C. Hormone production
D. Oxygen transport
🟢 Correct Answer: D. Oxygen transport
🔴 Explanation: Hemoglobin within red blood cells carries oxygen
throughout the body.
5. Which vitamin deficiency causes scurvy?
AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS
• Osteopathic Principles and Practice (OPP)
• Anatomy
• Physiology
• Biochemistry
• Microbiology
• Pathology
• Pharmacology
• Behavioral Science and Ethics
,• Neurology
• Systems-Based Clinical Integration
INTRODUCTION
This assessment is designed as a comprehensive last-minute review
for COMLEX Level 1 candidates. It evaluates foundational biomedical
sciences, osteopathic principles, clinical reasoning, and the
integration of scientific knowledge into patient care. Questions
include traditional multiple-choice items and scenario-based clinical
applications that mirror examination expectations. Emphasis is
placed on diagnostic reasoning, pathophysiology, pharmacology,
anatomy, ethics, and osteopathic manipulative medicine concepts.
The assessment encourages real-world decision-making and
reinforces high-yield topics frequently tested across multiple
disciplines. Detailed explanations accompany each answer to support
rapid review and strengthen conceptual understanding before
examination day.
SECTION ONE (QUESTIONS 1–50)
, 1. Which cranial nerve is responsible for facial expression?
A. Trigeminal nerve
B. Facial nerve
C. Glossopharyngeal nerve
D. Vagus nerve
🟢 Correct Answer: B. Facial nerve
🔴 Explanation: The facial nerve (CN VII) innervates the muscles of
facial expression.
2. A patient develops hyperglycemia due to insulin deficiency.
Which organ produces insulin?
A. Pancreas
B. Liver
C. Spleen
D. Adrenal gland
🟢 Correct Answer: A. Pancreas
🔴 Explanation: Beta cells of the pancreatic islets produce insulin.
3. Which neurotransmitter is deficient in Parkinson disease?
, A. Serotonin
B. GABA
C. Dopamine
D. Acetylcholine
🟢 Correct Answer: C. Dopamine
🔴 Explanation: Degeneration of substantia nigra neurons leads to
dopamine deficiency.
4. The primary function of red blood cells is:
A. Clot formation
B. Immune defense
C. Hormone production
D. Oxygen transport
🟢 Correct Answer: D. Oxygen transport
🔴 Explanation: Hemoglobin within red blood cells carries oxygen
throughout the body.
5. Which vitamin deficiency causes scurvy?
