A 73-year old man is brought to the emergency room for dizziness and nystagmus. Examination reveals loss of sensation on the left side of his face and the right side of his body. He has hoarseness of voice and drooping of his right eyelid. The right side of the face is drier than the left […]
usmle step 1
Repeated USMLE Questions Step 1- 254
A 4-year old girl is brought to the clinic by her mother complaining of fever and abdominal pain since yesterday. Today, she looks uncomfortable during micturition. On examination, her temperature is 99.4, her pulse is 100/min. and her suprapubic area is soft and tender. Her blood analysis shows increased neutrophils. Her urinalysis is positive for […]
Repeated USMLE Questions Step 1- 253
A 67-year old man is brought to the emergency room by his colleagues for a possible heart attack. One hour ago, he felt excruciating chest pain, shortness of breath and nausea. ECG shows elevation of ST segment in leads 11, 111 and aVF. Therapy is initiated and the patient starts feeling better. ER physician explains […]
Repeated USMLE Questions Step 1- 252
A 48-year-old woman is taken for autopsy after she is pronounced dead. Her family found her unresponsive and the ER team performed CPR but she didn’t respond. The autopsy reveals the cause of death as internal hemorrhage from an artery close to the posterior wall of the body of the stomach due to erosion of […]
Repeated USMLE Questions Step 1- 251
A 17-year-old girl visits the clinic with her mother who is concerned that her daughter had not menstruated yet and her breast had not been significantly developed. She also notes that her daughter is color blind. The girl denies any sexual relationship or using any recreational drugs. Examination reveals normally appearing girl with small non-developed […]
Repeated USMLE Questions Step 1- 250
A 2-year-old boy originally from Egypt is diagnosed with anemia after he took antibiotics for the treatment of otitis media. He has two brothers and one sister. One of his brothers was diagnosed with anemia when he was two years old. His parents were given a list of food and drugs that could be associated […]
Repeated USMLE Questions Step 1- 174
A 26 year old woman is brought to the emergency room due to 2-hour history of hematemesis. She was invited to a banquet at her work and she vomited twice with a considerable amount of blood. Her medical, surgical and family histories are unremarkable. She visits her dentist regularly for recurrent dental caries. She doesn’t […]
Repeated USMLE Questions Step 1- 173
Gluconeogenesis is a metabolic process in which glucose is generated from non-carbohydrate carbon substrates. Which one of the following substrates does NOT share its carbon in glucose skeleton but rather contributes as an energy source for gluconeogenesis? A- Acetyl CoA B- Alpha-ketoglutarate C- Fumarate D- Oxaloacetate E- Succinyl CoA Answer Acetyl CoA is an energy […]
Repeated USMLE Questions Step 1- 172
A 22-year-old woman presents to the clinic for a recurrent urinary tract infection. She is prescribed trimethoprim/sulfamethoxazole. What is the mechanism of action of this antimicrobial drug? A- Inhibition of bacterial wall synthesis B- Inhibition of folic acid synthesis C- Inhibition of bacterial protein synthesis D- Inhibition of mycolic acid synthesis E- Inactivation of bacterial […]
Repeated USMLE Questions Step 1- 171
A 5-year-old boy is brought to the ER by his mother. He has fever, cough, lethargy, headache and neck pain. On examination, his temperature is 103.2 F, his neck is rigid and tender and Kernig sign is positive. CSF is clear and significant for glucose 60 mg/dL, protein 80 mg/dL, no bacteria or pus cells […]