Which of the following drugs is an antacid? 

Which of the following syndromes corresponds to: hematuria, glomerulonephritis and pulmonary dysfunction? 

A 40-year-old woman comes to the physician because of a 6-month history of increased facial hair growth. Her last menstrual period was 4 months ago. She is 165 cm (5 ft 5 in) tall and weighs 70 kg (154 lb); BMI is 26 kg/m2. Her pulse is 80/min, and blood pressure is 130/82 mm Hg. Physical examination shows temporal balding and coarse dark hair on the upper lip and chin. Pelvic examination shows clitoral enlargement. Her serum testosterone concentration is increased. Serum concentrations of androstenedione, dehydroepiandrosterone, and urinary 17-ketosteroids are within the reference ranges. Ultrasonography of the pelvis shows a 12-cm ovarian mass. Which of the following best describes this mass?

A 30-year-old Caucasian male with HIV/AIDS develops right-sided weakness involving his right leg. A MRI of his brain reveals multiple ring enhancing lesions within the white matter in his left frontal lobe. The most likely source of this infection in the United States is

A couple has a daughter who is ataxic and has a seizure disorder. She also has a strange affect characterized by excessive laughter at inappropriate times. Cytogenetic analysis demonstrates a normal genotype with 46 chromosomes and no apparent deletions. These symptoms are most likely due to: