COMSAE Phase 1 Form 114 Practice
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A| Instant
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1. A 65-year-old man develops crushing substernal chest pain radiating
to his left arm. Which coronary artery is most commonly involved in
an anterior wall myocardial infarction?
A. Right coronary artery
B. Circumflex artery
C. Left anterior descending artery
D. Posterior descending artery
Answer: C. Left anterior descending artery
Rationale: The left anterior descending artery supplies the anterior wall of
the left ventricle and interventricular septum. Occlusion commonly causes
anterior myocardial infarction.
, 2. A patient with chronic alcoholism presents with confusion, ataxia, and
ophthalmoplegia. Which vitamin deficiency is responsible?
A. Vitamin B12
B. Niacin
C. Folate
D. Thiamine
Answer: D. Thiamine
Rationale: Wernicke encephalopathy results from thiamine deficiency and
is characterized by confusion, ataxia, and ophthalmoplegia.
3. Which structure is derived from the neural crest?
A. Skeletal muscle
B. Kidney tubules
C. Adrenal medulla
D. Liver
Answer: C. Adrenal medulla
Rationale: Neural crest cells give rise to the adrenal medulla, melanocytes,
Schwann cells, and portions of craniofacial structures.
, 4. A child develops honey-colored crusted lesions around the mouth.
What is the most likely diagnosis?
A. Cellulitis
B. Erysipelas
C. Impetigo
D. Herpes simplex
Answer: C. Impetigo
Rationale: Impetigo commonly presents with honey-colored crusts and is
usually caused by Staphylococcus aureus or Streptococcus pyogenes.
5. Which acid-base disturbance is expected in prolonged vomiting?
A. Metabolic acidosis
B. Respiratory acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis
Answer: D. Metabolic alkalosis
Rationale: Loss of gastric hydrochloric acid through vomiting results in
metabolic alkalosis.
6. A patient has elevated TSH and low free T4. What is the diagnosis?
, A. Secondary hypothyroidism
B. Hyperthyroidism
C. Euthyroid sick syndrome
D. Primary hypothyroidism
Answer: D. Primary hypothyroidism
Rationale: Primary thyroid gland failure leads to low thyroid hormone
levels and compensatory elevation of TSH.
7. Which immunoglobulin crosses the placenta?
A. IgA
B. IgM
C. IgE
D. IgG
Answer: D. IgG
Rationale: IgG is the only immunoglobulin class that crosses the placenta
and provides passive immunity to the fetus.
8. A patient presents with severe right lower quadrant pain and rebound
tenderness. Which diagnosis is most likely?
A. Diverticulitis
B. Cholecystitis
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A| Instant
Download Pdf
1. A 65-year-old man develops crushing substernal chest pain radiating
to his left arm. Which coronary artery is most commonly involved in
an anterior wall myocardial infarction?
A. Right coronary artery
B. Circumflex artery
C. Left anterior descending artery
D. Posterior descending artery
Answer: C. Left anterior descending artery
Rationale: The left anterior descending artery supplies the anterior wall of
the left ventricle and interventricular septum. Occlusion commonly causes
anterior myocardial infarction.
, 2. A patient with chronic alcoholism presents with confusion, ataxia, and
ophthalmoplegia. Which vitamin deficiency is responsible?
A. Vitamin B12
B. Niacin
C. Folate
D. Thiamine
Answer: D. Thiamine
Rationale: Wernicke encephalopathy results from thiamine deficiency and
is characterized by confusion, ataxia, and ophthalmoplegia.
3. Which structure is derived from the neural crest?
A. Skeletal muscle
B. Kidney tubules
C. Adrenal medulla
D. Liver
Answer: C. Adrenal medulla
Rationale: Neural crest cells give rise to the adrenal medulla, melanocytes,
Schwann cells, and portions of craniofacial structures.
, 4. A child develops honey-colored crusted lesions around the mouth.
What is the most likely diagnosis?
A. Cellulitis
B. Erysipelas
C. Impetigo
D. Herpes simplex
Answer: C. Impetigo
Rationale: Impetigo commonly presents with honey-colored crusts and is
usually caused by Staphylococcus aureus or Streptococcus pyogenes.
5. Which acid-base disturbance is expected in prolonged vomiting?
A. Metabolic acidosis
B. Respiratory acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis
Answer: D. Metabolic alkalosis
Rationale: Loss of gastric hydrochloric acid through vomiting results in
metabolic alkalosis.
6. A patient has elevated TSH and low free T4. What is the diagnosis?
, A. Secondary hypothyroidism
B. Hyperthyroidism
C. Euthyroid sick syndrome
D. Primary hypothyroidism
Answer: D. Primary hypothyroidism
Rationale: Primary thyroid gland failure leads to low thyroid hormone
levels and compensatory elevation of TSH.
7. Which immunoglobulin crosses the placenta?
A. IgA
B. IgM
C. IgE
D. IgG
Answer: D. IgG
Rationale: IgG is the only immunoglobulin class that crosses the placenta
and provides passive immunity to the fetus.
8. A patient presents with severe right lower quadrant pain and rebound
tenderness. Which diagnosis is most likely?
A. Diverticulitis
B. Cholecystitis
