A 32-year-old woman with a history of generalized anxiety disorder develops numbness of her face particularly around her mouth. Physical examination and x-ray show no abnormalities other than markedly increased respiratory rate. Laboratory investigations are as follows: PO2: 100 mmHg PCO2: 30 mmHg Bicarbonate: 18 mEq/L pH of blood: 7.51 Which of these findings shows […]
Pharmacology MCQs- 228
A 40-year-old man who works in a manufacture of explosives presents to the clinic for a routine physical examination. Medical history reveals that the patient experiences episodes of headache and palpitation every Monday. Physical examination, laboratory tests and ECG show normal results. The patient questions if the chemicals related to his job could be responsible […]
Repeated USMLE Questions Step 1- 306
A 37-year-old woman complains of watery diarrhea, abdominal cramps and periodic facial flushing for the last six months. Examination reveals bilateral wheezing and slightly enlarged liver. Urine analysis shows high levels of 5-hydroxyindoleacetic acid (5-HIAA). Multiple tumors are detected by a CT scan. What is the most likely primary site of these tumors? A-Colon B-Esophagus […]
Pharmacology MCQs- 227 #usmle
A 45-year-old woman is sent to the emergency room from a vision center after examining her eyes to get new glasses. While she was in the waiting room, she developed severe ocular pain in her right eye and she started seeing halos around light. Which of these agents most likely is the reason for this […]
Repeated USMLE Questions Step 1- 305
A week old female presents for her first checkup. Examination reveals jaundice and splenomegaly. Laboratory investigations show: Total bilirubin level: 27 mg/dL Direct bilirubin: 0.6 mg/dL Hgb: 10.1 g/dL Reticulocytes: 6% A blood smear shows burr cells and spherocytosis. Which of these tests will be positive in this patient? A-Acid hemolysis test B-Coomb’s test C-Osmotic […]
Repeated USMLE Questions Step 1- 304
A 32-year-old man with a history of HIV infection presents to the clinic complaining of fecal urgency and bloody diarrhea. The patient was diagnosed with pneumocystis jiroveci pneumonia 6 months ago. Which of these organisms is the most likely involved in this condition? A-Clostridium difficile B-cytomegalovirus C-Entamoeba histolytica D-Giardia lamblia Answer Fecal urgency and bloody […]