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COMSAE Phase 1 Form 115 EXAM QUESTIONS AND CORRECT
VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR – JUST
RELEASED
COMSAE Phase 1 Form 115–Focused Practice Exam
Brief Exam Coverage
Pulmonary Physiology and Pathology
Cardiovascular Disease
Microbiology and Infectious Disease
Neurology
Endocrinology
Renal Physiology
Pharmacology
Ethics and Professionalism
Osteopathic Principles and Clinical Integration
Foundational Biochemistry
Question 1
A 67-year-old man with a 45-pack-year smoking history presents with progressive shortness of
breath, chronic productive cough, and increasing exercise intolerance over the past several
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years. Physical examination reveals prolonged expiration, diffuse wheezing, and use of
accessory respiratory muscles. Pulmonary function testing demonstrates decreased FEV1,
decreased FEV1/FVC ratio, increased residual volume, and increased total lung capacity.
Which pathophysiologic process most directly explains this patient's increased residual volume?
A. Increased pulmonary fibrosis causing reduced compliance
B. Destruction of alveolar walls leading to air trapping
C. Pulmonary vascular remodeling causing elevated resistance
D. Thickening of alveolar membranes reducing diffusion
Correct Answer: B. Destruction of alveolar walls leading to air trapping
Rationale
This patient has chronic obstructive pulmonary disease with emphysematous changes.
Destruction of alveolar septa reduces elastic recoil, preventing complete exhalation and causing
air trapping. This leads to increased residual volume and hyperinflation.
Question 2
A 23-year-old woman presents with episodic wheezing, chest tightness, and shortness of breath
that worsen during spring months and after exposure to cats. Pulmonary function testing
demonstrates reversible airflow obstruction following bronchodilator administration.
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Which inflammatory mediator plays a central role in the early-phase response of this condition?
A. Histamine
B. Dopamine
C. Acetylcholine
D. Bradykinin
Correct Answer: A. Histamine
Rationale
Allergic asthma involves IgE-mediated mast cell degranulation. Histamine is rapidly released and
contributes to bronchoconstriction, mucus secretion, and airway inflammation during the early
asthmatic response.
Question 3
A 59-year-old man arrives at the emergency department with crushing substernal chest pain
radiating to his left shoulder. Electrocardiography demonstrates ST-segment elevations in leads
V1 through V4.
Which coronary artery is most likely occluded?
A. Right coronary artery
B. Left circumflex artery
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C. Left anterior descending artery
D. Posterior descending artery
Correct Answer: C. Left anterior descending artery
Rationale
ST-segment elevations in leads V1–V4 indicate an anterior wall myocardial infarction. The left
anterior descending artery supplies the anterior wall and interventricular septum.
Question 4
A 32-year-old woman presents with fatigue, heat intolerance, palpitations, and unintentional
weight loss. Examination reveals bilateral exophthalmos and diffuse thyroid enlargement.
Laboratory studies reveal elevated free T4 and suppressed TSH.
What is the most likely mechanism underlying this disorder?
A. Destruction of thyroid follicles by cytotoxic T cells
B. Autoantibody stimulation of TSH receptors
C. Deficiency of thyroid peroxidase activity
D. Excess hypothalamic TRH secretion
Correct Answer: B. Autoantibody stimulation of TSH receptors
Rationale
COMSAE Phase 1 Form 115 EXAM QUESTIONS AND CORRECT
VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR – JUST
RELEASED
COMSAE Phase 1 Form 115–Focused Practice Exam
Brief Exam Coverage
Pulmonary Physiology and Pathology
Cardiovascular Disease
Microbiology and Infectious Disease
Neurology
Endocrinology
Renal Physiology
Pharmacology
Ethics and Professionalism
Osteopathic Principles and Clinical Integration
Foundational Biochemistry
Question 1
A 67-year-old man with a 45-pack-year smoking history presents with progressive shortness of
breath, chronic productive cough, and increasing exercise intolerance over the past several
, Page 2 of 87
years. Physical examination reveals prolonged expiration, diffuse wheezing, and use of
accessory respiratory muscles. Pulmonary function testing demonstrates decreased FEV1,
decreased FEV1/FVC ratio, increased residual volume, and increased total lung capacity.
Which pathophysiologic process most directly explains this patient's increased residual volume?
A. Increased pulmonary fibrosis causing reduced compliance
B. Destruction of alveolar walls leading to air trapping
C. Pulmonary vascular remodeling causing elevated resistance
D. Thickening of alveolar membranes reducing diffusion
Correct Answer: B. Destruction of alveolar walls leading to air trapping
Rationale
This patient has chronic obstructive pulmonary disease with emphysematous changes.
Destruction of alveolar septa reduces elastic recoil, preventing complete exhalation and causing
air trapping. This leads to increased residual volume and hyperinflation.
Question 2
A 23-year-old woman presents with episodic wheezing, chest tightness, and shortness of breath
that worsen during spring months and after exposure to cats. Pulmonary function testing
demonstrates reversible airflow obstruction following bronchodilator administration.
, Page 3 of 87
Which inflammatory mediator plays a central role in the early-phase response of this condition?
A. Histamine
B. Dopamine
C. Acetylcholine
D. Bradykinin
Correct Answer: A. Histamine
Rationale
Allergic asthma involves IgE-mediated mast cell degranulation. Histamine is rapidly released and
contributes to bronchoconstriction, mucus secretion, and airway inflammation during the early
asthmatic response.
Question 3
A 59-year-old man arrives at the emergency department with crushing substernal chest pain
radiating to his left shoulder. Electrocardiography demonstrates ST-segment elevations in leads
V1 through V4.
Which coronary artery is most likely occluded?
A. Right coronary artery
B. Left circumflex artery
, Page 4 of 87
C. Left anterior descending artery
D. Posterior descending artery
Correct Answer: C. Left anterior descending artery
Rationale
ST-segment elevations in leads V1–V4 indicate an anterior wall myocardial infarction. The left
anterior descending artery supplies the anterior wall and interventricular septum.
Question 4
A 32-year-old woman presents with fatigue, heat intolerance, palpitations, and unintentional
weight loss. Examination reveals bilateral exophthalmos and diffuse thyroid enlargement.
Laboratory studies reveal elevated free T4 and suppressed TSH.
What is the most likely mechanism underlying this disorder?
A. Destruction of thyroid follicles by cytotoxic T cells
B. Autoantibody stimulation of TSH receptors
C. Deficiency of thyroid peroxidase activity
D. Excess hypothalamic TRH secretion
Correct Answer: B. Autoantibody stimulation of TSH receptors
Rationale
