COMSAE PHASE 1 PRACTICE EXAM
QUESTIONS & CORRECT ANSWERS
(VERIFIED) WITH RATIONALES
Question 1
A 24-year-old male presents with acute, sharp right lower
quadrant pain. Palpation reveals tenderness at McBurney's
point. Which of the following pathophysiological processes is
the most likely cause?
A) Inflammation of Meckel's diverticulum
B) Obstruction of the appendix lumen by a fecalith
C) Rupture of a graafian follicle
D) Infection of Peyer's patches by Yersinia enterocolitica
Correct Answer: B
Rationale: The most common cause of acute appendicitis is
obstruction of the appendiceal lumen, typically by a fecalith
(calcified feces). This obstruction leads to increased
intraluminal pressure, bacterial overgrowth, and ischemia,
resulting in the classic pain migration to the RLQ. While A, C,
,and D can cause RLQ pain, they are less common causes of
this classic presentation.
Question 2
A patient presents with right upper quadrant pain radiating to
the right shoulder, especially after eating fatty meals. An
ultrasound reveals echogenic shadows in the gallbladder. What
is the anatomical innervation responsible for the referred
shoulder pain?
A) Vagus nerve
B) Phrenic nerve (C3-C5)
C) Greater splanchnic nerve (T5-T9)
D) Intercostal nerves (T7-T11)
Correct Answer: B
Rationale: Referred pain to the right shoulder (Kehr's sign) in
biliary colic results from irritation of the diaphragm. The
central portion of the diaphragm is innervated by the phrenic
nerve (C3-C5). The sensory fibers from the gallbladder travel
via the splanchnic nerves (T5-T9), but the shared dermatomes
with the phrenic nerve cause the shoulder referral.
Question 3
In Osteopathic Manipulative Medicine (OMM), the
,"Respiratory-Circulatory Model" is a key principle. Which of
the following best describes its primary goal?
A) To correct somatic dysfunction by leveraging the inherent
rhythmic motion of the craniosacral system.
B) To enhance the body's ability to produce its own
endogenous opioids.
C) To improve the function of the body's metabolic and
immune systems by ensuring adequate lymphatic and vascular
flow.
D) To normalize autonomic nervous system balance by focusing
on the pelvic diaphragm.
Correct Answer: C
Rationale: The Respiratory-Circulatory Model of osteopathic
care focuses on optimizing the mechanics of breathing and
circulation to enhance tissue perfusion, lymphatic drainage,
and overall immune/metabolic function. It posits that many
diseases are exacerbated by congestion or stasis in these
systems.
Question 4
A 45-year-old male with a history of chronic alcohol abuse
presents with confusion, ataxia, and ophthalmoplegia. Which
vitamin deficiency is the most likely cause of this triad?
A) Vitamin B1 (Thiamine)
, B) Vitamin B3 (Niacin)
C) Vitamin B6 (Pyridoxine)
D) Vitamin B12 (Cobalamin)
Correct Answer: A
Rationale: The classic triad of confusion, ataxia, and
ophthalmoplegia is Wernicke-Korsakoff syndrome, most
commonly caused by a severe deficiency in Thiamine (Vitamin
B1). It is frequently seen in chronic alcoholics due to poor
nutrition and impaired absorption.
Question 5
During a physical exam, a physician palpates the patient's
abdomen and feels a palpable thrill over the liver, and
auscultates a bruit. This is a classic sign of:
A) Portal hypertension
B) Hepatic adenoma
C) Hepatocellular carcinoma
D) Cirrhosis with hepatic hydrothorax
Correct Answer: C
Rationale: A palpable thrill and a bruit (venous hum) over the
liver are classic, although rare, findings associated with
Hepatocellular Carcinoma (HCC). The tumor's high vascularity
QUESTIONS & CORRECT ANSWERS
(VERIFIED) WITH RATIONALES
Question 1
A 24-year-old male presents with acute, sharp right lower
quadrant pain. Palpation reveals tenderness at McBurney's
point. Which of the following pathophysiological processes is
the most likely cause?
A) Inflammation of Meckel's diverticulum
B) Obstruction of the appendix lumen by a fecalith
C) Rupture of a graafian follicle
D) Infection of Peyer's patches by Yersinia enterocolitica
Correct Answer: B
Rationale: The most common cause of acute appendicitis is
obstruction of the appendiceal lumen, typically by a fecalith
(calcified feces). This obstruction leads to increased
intraluminal pressure, bacterial overgrowth, and ischemia,
resulting in the classic pain migration to the RLQ. While A, C,
,and D can cause RLQ pain, they are less common causes of
this classic presentation.
Question 2
A patient presents with right upper quadrant pain radiating to
the right shoulder, especially after eating fatty meals. An
ultrasound reveals echogenic shadows in the gallbladder. What
is the anatomical innervation responsible for the referred
shoulder pain?
A) Vagus nerve
B) Phrenic nerve (C3-C5)
C) Greater splanchnic nerve (T5-T9)
D) Intercostal nerves (T7-T11)
Correct Answer: B
Rationale: Referred pain to the right shoulder (Kehr's sign) in
biliary colic results from irritation of the diaphragm. The
central portion of the diaphragm is innervated by the phrenic
nerve (C3-C5). The sensory fibers from the gallbladder travel
via the splanchnic nerves (T5-T9), but the shared dermatomes
with the phrenic nerve cause the shoulder referral.
Question 3
In Osteopathic Manipulative Medicine (OMM), the
,"Respiratory-Circulatory Model" is a key principle. Which of
the following best describes its primary goal?
A) To correct somatic dysfunction by leveraging the inherent
rhythmic motion of the craniosacral system.
B) To enhance the body's ability to produce its own
endogenous opioids.
C) To improve the function of the body's metabolic and
immune systems by ensuring adequate lymphatic and vascular
flow.
D) To normalize autonomic nervous system balance by focusing
on the pelvic diaphragm.
Correct Answer: C
Rationale: The Respiratory-Circulatory Model of osteopathic
care focuses on optimizing the mechanics of breathing and
circulation to enhance tissue perfusion, lymphatic drainage,
and overall immune/metabolic function. It posits that many
diseases are exacerbated by congestion or stasis in these
systems.
Question 4
A 45-year-old male with a history of chronic alcohol abuse
presents with confusion, ataxia, and ophthalmoplegia. Which
vitamin deficiency is the most likely cause of this triad?
A) Vitamin B1 (Thiamine)
, B) Vitamin B3 (Niacin)
C) Vitamin B6 (Pyridoxine)
D) Vitamin B12 (Cobalamin)
Correct Answer: A
Rationale: The classic triad of confusion, ataxia, and
ophthalmoplegia is Wernicke-Korsakoff syndrome, most
commonly caused by a severe deficiency in Thiamine (Vitamin
B1). It is frequently seen in chronic alcoholics due to poor
nutrition and impaired absorption.
Question 5
During a physical exam, a physician palpates the patient's
abdomen and feels a palpable thrill over the liver, and
auscultates a bruit. This is a classic sign of:
A) Portal hypertension
B) Hepatic adenoma
C) Hepatocellular carcinoma
D) Cirrhosis with hepatic hydrothorax
Correct Answer: C
Rationale: A palpable thrill and a bruit (venous hum) over the
liver are classic, although rare, findings associated with
Hepatocellular Carcinoma (HCC). The tumor's high vascularity
