with Answers & Detailed Rationales Graded A+ |
Updated for 2026/2027 | 100% Correct
SECTION 1: PATHOPHYSIOLOGY & PHYSICAL ASSESSMENT (Questions 1-40)
Question 1
A 55-year-old male presents with progressive shortness of breath and a nonproductive
cough for 3 months. He reports a 30-pack-year smoking history. Chest auscultation
reveals diminished breath sounds at the lung bases and fine inspiratory crackles that do
not clear with coughing. Which condition is MOST consistent with these findings?
A) Chronic bronchitis
B) Idiopathic pulmonary fibrosis
C) Emphysema
D) Bronchiectasis
Correct Answer: B
Rationale: Idiopathic pulmonary fibrosis is characterized by progressive dyspnea,
nonproductive cough, and fine inspiratory crackles (Velcro crackles). The crackles are
persistent and do not clear with coughing (unlike bronchitis). The condition is more
common in older adults and associated with smoking history. Emphysema typically
presents with a barrel chest and diminished breath sounds but not crackles.
Bronchiectasis produces coarse, moist crackles that may clear with coughing.
Question 2
A 68-year-old female with type 2 diabetes presents with a 2-week history of progressive
weakness in her right leg, difficulty with balance, and urinary incontinence. Her
symptoms are worse with fatigue and improve in the morning. This presentation is
MOST consistent with:
,A) Amyotrophic lateral sclerosis (ALS)
B) Guillain-Barré syndrome
C) Multiple sclerosis (MS)
D) Stroke
Correct Answer: C
Rationale: Multiple sclerosis is a demyelinating disease characterized by neurologic
symptoms that worsen with fatigue (Uthoff's phenomenon) and improve with rest. The
combination of motor weakness, balance issues, and urinary incontinence with a
relapsing-remitting pattern is classic for MS. ALS typically presents with both upper and
lower motor neuron findings without sensory involvement. Guillain-Barré presents with
ascending paralysis. Stroke presents with acute, focal deficits without the fluctuating
pattern.
Question 3
A 72-year-old male with a history of hypertension presents with abdominal pain. On
examination, you note a pulsatile mass in the periumbilical area. What is the MOST
appropriate initial diagnostic test?
A) Abdominal X-ray
B) CT angiography
C) Abdominal ultrasound
D) MRI abdomen
Correct Answer: C
Rationale: A pulsatile abdominal mass in an elderly patient with hypertension is
concerning for an abdominal aortic aneurysm (AAA). Abdominal ultrasound is the
preferred initial screening test for AAA because it is noninvasive, widely available, and
cost-effective. CT angiography is more definitive but exposes the patient to radiation
and contrast. MRI is not typically the first-line screening test.
Question 4
A 45-year-old female presents with fatigue, weight gain, cold intolerance, and
constipation. Physical examination reveals dry skin, periorbital edema, and a nonpitting
,edema of the lower extremities. Which laboratory finding is MOST consistent with this
presentation?
A) Elevated TSH and low free T4
B) Low TSH and elevated free T4
C) Elevated TSH and elevated free T4
D) Normal TSH and low free T4
Correct Answer: A
Rationale: The patient's symptoms (fatigue, weight gain, cold intolerance, constipation)
and physical findings (dry skin, periorbital edema, nonpitting edema) are classic for
hypothyroidism. Primary hypothyroidism is characterized by elevated TSH with low free
T4 due to decreased negative feedback on the pituitary. Secondary hypothyroidism
would show low TSH with low free T4.
Question 5
A 60-year-old male with a history of alcohol use disorder presents with confusion,
asterixis, and jaundice. Which laboratory finding is MOST consistent with hepatic
encephalopathy?
A) Elevated serum ammonia
B) Elevated serum bilirubin
C) Prolonged prothrombin time
D) Decreased serum albumin
Correct Answer: A
Rationale: Hepatic encephalopathy is characterized by elevated serum ammonia levels
due to impaired liver detoxification. Asterixis (liver flap) is a classic physical finding.
While elevated bilirubin, prolonged PT, and decreased albumin may also be present in
liver disease, elevated ammonia is most specifically associated with encephalopathy.
Question 6
A 50-year-old female reports chronic bilateral knee pain that worsens with activity and
, improves with rest. On examination, you note crepitus on passive movement and bony
enlargement of the joint. Which condition is MOST likely?
A) Rheumatoid arthritis
B) Osteoarthritis
C) Gout
D) Septic arthritis
Correct Answer: B
Rationale: Osteoarthritis is a noninflammatory degenerative joint disease characterized
by pain that worsens with activity and improves with rest. Physical findings include
crepitus and bony enlargement (osteophytes). Rheumatoid arthritis is an inflammatory
condition with morning stiffness >30 minutes and systemic symptoms. Gout presents
with acute, severe monoarticular pain. Septic arthritis presents with acute, hot, swollen
joint with systemic signs of infection.
Question 7
A 35-year-old female presents with palpitations, heat intolerance, and unintentional
weight loss of 10 pounds over 2 months despite increased appetite. On examination,
she has tachycardia and a fine tremor. Which laboratory finding is MOST consistent with
this presentation?
A) Elevated TSH and low T4
B) Low TSH and elevated T4
C) Elevated TSH and elevated T4
D) Normal TSH and low T4
Correct Answer: B
Rationale: The patient's symptoms (palpitations, heat intolerance, weight loss, increased
appetite, tachycardia, tremor) are classic for hyperthyroidism. Primary hyperthyroidism
(Graves' disease) shows low TSH with elevated free T4 due to decreased negative
feedback on the pituitary.