USMLE Online Practice Questions and Answers

A 54-year-old man comes to the physician for a follow-up examination 10 days after undergoing a stereotactic brain operation to remove a small tumor. The operation was successful. During the procedure, he was under conscious sedation. The patient recalls that at one point during the operation he experienced a sudden, intense feeling of overwhelming fear. Which of the following areas of the brain was most likely stimulated at that time?

A. Amygdala

B. Hippocampus

C. Mammillary body

D. Prefrontal cortex

E. Thalamus

A 12-year-old boy is brought to the physician by his mother because of a 1-month history of pain below the left knee. His mother says, "He can usually walk around, but he hasn't been able to play in any of his soccer games since this all began." Examination of the left knee shows warmth, swelling, and tenderness. An x-ray of the knee is shown. Which of the following structures is attached to the abnormal anterior tibial area?

A. Anterior cruciate ligament

B. Gastrocnemius muscle

C. Patellar ligament

D. Popliteus muscle

E. Posterior cruciate ligament

F. Soleus muscle

A 34-year-old female comes to the physician with nausea and abdominal pain. She indicates that the pain is epigastric, and it improves with food intake. She also reports recent weight gain. A urease breath test is obtained which is positive. This patient is most likely at an increased risk for developing

A. bladder cancer

B. brain abscesses

C. gastric adenocarcinoma

D. heart block

E. myocarditis

The upper and middle trucks of the brachial plexus combine to form the ____ cord.

A. Lateral

B. Posterior

C. Medial

D. Anterior

Which of the following terms correspond with the phrase: a woman that is pregnant?

A. Gravida

B. Parity

C. Spermatogonia

D. Zonapellucida

Which of the following conditions correlate with the following information:

High pH High HCO3 High BE Neutral pCO2

A. Respiratory alkalosis

B. Respiratory acidosis

C. Metabolic acidosis

D. Metabolic alkalosis

Which of the following is not considered a major branch off of the descending thoracic aorta?

A. Mediastinal artery

B. Renal artery

C. Bronchial artery

D. Posterior intercostal artery

T-cell activation requires a/an _______ cell.

A. Activation

B. Accessory

C. Plasma

D. Helper

Which of the following is not considered a type of synapse?

A. Dendrodendritic

B. Axosomatic

C. Axoaxonic

D. Denoaxonic

Which of the following cranial nerves can cause movement of trapezius muscle?

A. IV

B. VII

C. X

D. XI