COMSAE Comprehensive Practice
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. A 24-year-old woman presents with fatigue, weight loss, heat
intolerance, tremor, and palpitations. Examination reveals diffuse
thyroid enlargement and bilateral exophthalmos. Which
mechanism best explains her condition?
A. Destruction of thyroid follicles by cytotoxic T cells
B. Autoantibodies stimulating the TSH receptor
C. Autonomous thyroid adenoma producing T3 and T4
D. Excessive secretion of thyrotropin from the pituitary
Answer: B. Autoantibodies stimulating the TSH receptor
Rationale: Graves disease results from IgG antibodies directed against
the TSH receptor. These antibodies stimulate thyroid hormone
production and growth of thyroid tissue. Ophthalmopathy is also
characteristic.
2. A 67-year-old man develops sudden right-sided weakness and
expressive aphasia. He was last known well 90 minutes ago. CT of
the head shows no hemorrhage. Which intervention is most
appropriate if no contraindications are present?
A. Intravenous alteplase
B. Immediate aspirin only
C. Intravenous heparin
D. Carotid endarterectomy
,Answer: A. Intravenous alteplase
Rationale: An eligible patient with acute ischemic stroke presenting
within the appropriate thrombolytic window should receive
intravenous thrombolysis after intracranial hemorrhage has been
excluded. Mechanical thrombectomy may additionally be indicated for
selected large-vessel occlusions.
3. A 58-year-old man with crushing substernal chest pain has ST-
segment elevations in leads II, III, and aVF. Which coronary artery
is most likely occluded?
A. Left anterior descending artery
B. Left circumflex artery
C. Right coronary artery
D. Left main coronary artery
Answer: C. Right coronary artery
Rationale: Inferior myocardial infarction classically produces ST
elevations in II, III, and aVF and most commonly results from right
coronary artery occlusion. The right coronary artery also frequently
supplies the AV node.
4. A 19-year-old college student presents with fever, headache, neck
stiffness, and photophobia. Cerebrospinal fluid demonstrates
neutrophilic pleocytosis, elevated protein, and decreased glucose.
Which organism is most likely in a previously healthy young
adult?
A. Cryptococcus neoformans
B. Neisseria meningitidis
C. Listeria monocytogenes
D. Herpes simplex virus
,Answer: B. Neisseria meningitidis
Rationale: Neisseria meningitidis is an important cause of bacterial
meningitis in adolescents and young adults. It is transmitted through
respiratory secretions and can cause meningococcemia with a
characteristic petechial or purpuric rash.
5. A 45-year-old woman has recurrent episodes of unilateral
throbbing headache accompanied by nausea and photophobia.
Which medication is most appropriate for acute moderate-to-
severe attacks?
A. Sumatriptan
B. Propranolol
C. Topiramate
D. Amitriptyline
Answer: A. Sumatriptan
Rationale: Triptans such as sumatriptan are serotonin 5-HT1B/1D
agonists used for acute migraine attacks. Propranolol, topiramate, and
amitriptyline are primarily preventive therapies.
6. A 72-year-old woman has progressive memory impairment,
difficulty managing finances, and trouble navigating familiar
locations. MRI demonstrates diffuse cortical atrophy, particularly
involving the hippocampus. Which pathology is most
characteristic?
A. Alpha-synuclein inclusions
B. Beta-amyloid plaques and neurofibrillary tangles
C. Demyelination with oligoclonal bands
D. Subcortical demyelination with lacunar infarcts
Answer: B. Beta-amyloid plaques and neurofibrillary tangles
, Rationale: Alzheimer disease is associated with extracellular beta-
amyloid plaques and intracellular hyperphosphorylated tau
neurofibrillary tangles. Hippocampal involvement contributes
prominently to early memory impairment.
7. A 32-year-old woman presents with episodic wheezing, cough, and
chest tightness triggered by exercise and cold air. Spirometry
demonstrates reversible airflow obstruction. Which inflammatory
cell is particularly associated with this disease?
A. Eosinophil
B. Neutrophil
C. Monocyte
D. Natural killer cell
Answer: A. Eosinophil
Rationale: Asthma commonly involves type 2 inflammation with
eosinophils, mast cells, and Th2 lymphocytes. Eosinophilic
inflammation contributes to airway hyperresponsiveness and
reversible bronchoconstriction.
8. A 65-year-old smoker has progressive dyspnea and chronic
productive cough. Pulmonary function testing shows an obstructive
pattern that does not significantly reverse with bronchodilator
therapy. Which finding is most likely?
A. Increased FEV1/FVC ratio
B. Decreased residual volume
C. Increased total lung capacity
D. Decreased functional residual capacity
Answer: C. Increased total lung capacity
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. A 24-year-old woman presents with fatigue, weight loss, heat
intolerance, tremor, and palpitations. Examination reveals diffuse
thyroid enlargement and bilateral exophthalmos. Which
mechanism best explains her condition?
A. Destruction of thyroid follicles by cytotoxic T cells
B. Autoantibodies stimulating the TSH receptor
C. Autonomous thyroid adenoma producing T3 and T4
D. Excessive secretion of thyrotropin from the pituitary
Answer: B. Autoantibodies stimulating the TSH receptor
Rationale: Graves disease results from IgG antibodies directed against
the TSH receptor. These antibodies stimulate thyroid hormone
production and growth of thyroid tissue. Ophthalmopathy is also
characteristic.
2. A 67-year-old man develops sudden right-sided weakness and
expressive aphasia. He was last known well 90 minutes ago. CT of
the head shows no hemorrhage. Which intervention is most
appropriate if no contraindications are present?
A. Intravenous alteplase
B. Immediate aspirin only
C. Intravenous heparin
D. Carotid endarterectomy
,Answer: A. Intravenous alteplase
Rationale: An eligible patient with acute ischemic stroke presenting
within the appropriate thrombolytic window should receive
intravenous thrombolysis after intracranial hemorrhage has been
excluded. Mechanical thrombectomy may additionally be indicated for
selected large-vessel occlusions.
3. A 58-year-old man with crushing substernal chest pain has ST-
segment elevations in leads II, III, and aVF. Which coronary artery
is most likely occluded?
A. Left anterior descending artery
B. Left circumflex artery
C. Right coronary artery
D. Left main coronary artery
Answer: C. Right coronary artery
Rationale: Inferior myocardial infarction classically produces ST
elevations in II, III, and aVF and most commonly results from right
coronary artery occlusion. The right coronary artery also frequently
supplies the AV node.
4. A 19-year-old college student presents with fever, headache, neck
stiffness, and photophobia. Cerebrospinal fluid demonstrates
neutrophilic pleocytosis, elevated protein, and decreased glucose.
Which organism is most likely in a previously healthy young
adult?
A. Cryptococcus neoformans
B. Neisseria meningitidis
C. Listeria monocytogenes
D. Herpes simplex virus
,Answer: B. Neisseria meningitidis
Rationale: Neisseria meningitidis is an important cause of bacterial
meningitis in adolescents and young adults. It is transmitted through
respiratory secretions and can cause meningococcemia with a
characteristic petechial or purpuric rash.
5. A 45-year-old woman has recurrent episodes of unilateral
throbbing headache accompanied by nausea and photophobia.
Which medication is most appropriate for acute moderate-to-
severe attacks?
A. Sumatriptan
B. Propranolol
C. Topiramate
D. Amitriptyline
Answer: A. Sumatriptan
Rationale: Triptans such as sumatriptan are serotonin 5-HT1B/1D
agonists used for acute migraine attacks. Propranolol, topiramate, and
amitriptyline are primarily preventive therapies.
6. A 72-year-old woman has progressive memory impairment,
difficulty managing finances, and trouble navigating familiar
locations. MRI demonstrates diffuse cortical atrophy, particularly
involving the hippocampus. Which pathology is most
characteristic?
A. Alpha-synuclein inclusions
B. Beta-amyloid plaques and neurofibrillary tangles
C. Demyelination with oligoclonal bands
D. Subcortical demyelination with lacunar infarcts
Answer: B. Beta-amyloid plaques and neurofibrillary tangles
, Rationale: Alzheimer disease is associated with extracellular beta-
amyloid plaques and intracellular hyperphosphorylated tau
neurofibrillary tangles. Hippocampal involvement contributes
prominently to early memory impairment.
7. A 32-year-old woman presents with episodic wheezing, cough, and
chest tightness triggered by exercise and cold air. Spirometry
demonstrates reversible airflow obstruction. Which inflammatory
cell is particularly associated with this disease?
A. Eosinophil
B. Neutrophil
C. Monocyte
D. Natural killer cell
Answer: A. Eosinophil
Rationale: Asthma commonly involves type 2 inflammation with
eosinophils, mast cells, and Th2 lymphocytes. Eosinophilic
inflammation contributes to airway hyperresponsiveness and
reversible bronchoconstriction.
8. A 65-year-old smoker has progressive dyspnea and chronic
productive cough. Pulmonary function testing shows an obstructive
pattern that does not significantly reverse with bronchodilator
therapy. Which finding is most likely?
A. Increased FEV1/FVC ratio
B. Decreased residual volume
C. Increased total lung capacity
D. Decreased functional residual capacity
Answer: C. Increased total lung capacity
