Embryology USMLE Step 1 Practice Questions
54 board-style USMLE Step 1 questions in Anatomy. Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- USMLE Step 1 · hard25. A 2-year-old girl with tetralogy of Fallot presents with cyanosis and dyspnea on exertion. Vital signs show BP 95/60 mmHg, HR 118/min, RR 28/min, SpO2 88% on room air. Echocardi…
- USMLE Step 1 · medium26. A 3-day-old male newborn presents with severe respiratory distress and cyanosis. Vital signs: HR 165 bpm, RR 72/min, SpO2 78% on room air. Physical exam reveals a scaphoid abdom…
- USMLE Step 1 · medium27. A 4-year-old boy presents to the emergency department with a 3-day history of fever (38.5°C), abdominal pain, and purulent drainage from his umbilicus. His parents report he was…
- USMLE Step 1 · hard28. A 6-month-old girl is brought to the emergency department with fever (38.5°C), productive cough, and tachypnea (48 breaths/min). Her parents report recurrent episodes of sinusit…
- USMLE Step 1 · medium29. A 3-month-old girl presents to the emergency department with fever (38.5°C), poor feeding, and a purulent-draining mass on the left side of her neck. The mother reports the mass…
- USMLE Step 1 · medium30. A 2-day-old male newborn is brought to the emergency department with severe respiratory distress, stridor, and cyanosis. Vital signs show heart rate 168 bpm, respiratory rate 70…
- USMLE Step 1 · medium31. A 3-month-old female presents with nasal regurgitation during feeds and recurrent otitis media. Vital signs show HR 140 bpm, RR 35 breaths/min, and normal temperature. Physical…
- USMLE Step 1 · hard32. A 24-year-old woman presents with recurrent acute pancreatitis. Vital signs show BP 138/82 mmHg, HR 102/min, RR 18/min, temperature 37.8°C. She denies alcohol use and has no gal…
- USMLE Step 1 · medium33. A 2-day-old male newborn presents with persistent nonbilious vomiting after each feeding. Vital signs show HR 155 bpm, RR 42/min, temp 37.2°C, BP 65/40 mmHg. Upper GI imaging re…
- USMLE Step 1 · medium34. A 2-day-old male neonate presents with a small notch in the transitional zone and incomplete vermillion border of the upper lip. Vital signs are stable: BP 65/40 mmHg, HR 145 bp…
- USMLE Step 1 · medium35. While examining a newborn baby in the nursery, a physician notes that urine is draining from the umbilicus. Contrast dye is introduced into the bladder through the urethra, and…
- USMLE Step 1 · medium36. During anatomy lab, a medical student notes a fibrous band that runs on the visceral surface of the liver. It is attached on one end to the inferior vena cava and on the other e…
- USMLE Step 1 · medium37. During anatomy laboratory, a first-year medical student is dissecting the atrial chambers of the heart. At the upper border of the fossa ovalis, she discovers a small opening th…
- USMLE Step 1 · medium38. A 54-year-old male presents for routine health screening with vital signs: BP 128/82 mmHg, HR 76/min, RR 14/min, temperature 37.0°C. PSA level is elevated at 6.8 ng/mL; digital…
- USMLE Step 1 · medium39. A pregnant female comes to her physician with questions about the effect that ingested substances may have on her unborn child. The physician explains that large molecules do no…
- USMLE Step 1 · medium40. A 3-year-old male presents with recurrent pharyngitis and fever (temperature 38.5°C, heart rate 110/min). Physical examination reveals enlarged lymphoid masses on each side of t…
- USMLE Step 1 · medium41. After an amniocentesis, a 29-year-old woman who is carrying twins learns that one fetus has XY chromosomes and the other has XX chromosomes. At 37 weeks' gestation, the female d…
- USMLE Step 1 · medium42. A cyanotic newborn presents with severe respiratory distress and tachycardia (HR 165/min). Chest X-ray demonstrates cardiomegaly with increased pulmonary vascular markings. Echo…
- USMLE Step 1 · medium43. A mother brings her 5-year-old daughter to the physician complaining that the child still seems to regularly wet herself despite having been toilet-trained. The physician orders…
- USMLE Step 1 · medium44. A patient comes to the physician for a prenatal visit. Examination reveals that her uterus is considerably larger than her gestational age would predict. An ultrasound examinati…
- USMLE Step 1 · medium45. A 57-year-old man has hematuria and left-sided flank pain. Diagnostic studies show a left-sided renal mass with extension into the renal vein. A radical nephrectomy is performed…
- USMLE Step 1 · medium46. A 6-year-old male is brought to the office for evaluation of a neck mass. His mother reports that he first developed the mass 3 days ago, and it has not resolved. Further questi…
- USMLE Step 1 · medium47. An autopsy is performed on a man who died of an unknown cause. The pathologist discovers that the deceased has a small atrial septal defect. The defect is seen in the portion of…
- USMLE Step 1 · medium48. A 2-day-old male presents with abdominal distension and feeding intolerance. Physical examination reveals hepatomegaly and absence of normal hepatic ligament structures. Vitals…