Usage for hash tag: february2020usmle2ck

#february2020usmle2ck Which of the following histamine H1 antagonists is identified for its serotonin-blocking effect? A- Cyproheptadine B- Desloratadine C- Fexofenadine D- Loratadine

#february2020usmle2ck Which of the following explains the benefit of lactulose in hepatic encephalopathy? A- Lactulose antagonize the action of ammonia on hepatic cells B- Lactulose converts to lactic acid by intestinal bacteria which decreases ammonia C- Lactulose decreases stress of the...

#february2020usmle2ck Which statement is true regarding action of lung surfactant? A- It affects more large alveoli than sma alveoli B- It elevates surface tension forces and decreases compliance C- It lowers surface tension and decreases compliance D- It lowers surface tension and increases...

#february2020usmle2ck Which one of the following enzyme deficiencies is related to Tay-Sachs disease? A- Arylsulfatase A deficiency B- Glucocerebrosidase deficiency C- Hexosaminidase A deficiency D- Sphingomyelinase deficiency

#february2020usmle2ck Which of the following is the most abused drug for all ages in the United States? A- Alcohol B- Cocaine C- Marijuana D- Methamphetamine

#february2020usmle2ck Which of the following laboratory tests is diagnostic for adrenal insufficiency? A- ACTH stimulation test B- CT scan of adrenal gland C- Serum ACTH D- Serum cortisol

#february2020usmle2ck Which one of the following is characteristic of Chlamydia? A- Anaerobic bacteria B- Facultative intracellular C- Gram-negative diplococci D- Obligate intracellular

#february2020usmle2ck Which one of the following is the most appropriate next step in suspected scaphoid fracture (with normal radiology)? A- Admission and observation B- Assurance and follow up in 2 weeks C- Emergent orthopedic consultation D- Thumb spica splint

#february2020usmle2ck Which one of the following actions of epinephrine is blocked by prazosin? A- Bronchial dilation B- High stroke volume C- Pupil dilation D- Tachycardia

#february2020usmle2ck Which of the following differentiate neostigmine from pilocarpine? A- Acceleration of heart rate B- Prolonged skeletal muscle contraction C- Stimulation of bowel motility D- Stimulation of salivary glands

#february2020usmle2ck An 80 mg dose of a drug was administered to a patient. 40 mg was eliminated during the first hour. This drug follows first-order elimination kinetics. Which of the following is the amount of the drug remains 3 hours after administration? A- 30 mg B- 20 mg C- 10 mg D- None

#february2020usmle2ck Which one of the following substances induces the closure of patent ductus arteriosus? A- Estradiol B- Ibuprofen C- Indomethacin D- Prostaglandin E

#february2020usmle2ck Coagulation factor VIII is produced by which of the following cells? A- Endothelial cells B- Hepatic cells C- Juxtaglomerular cells D- Splenic macrophages

#february2020usmle2ck Which one of the following parts of fallopian tube is the widest and the most common site for fertilization? A- Ampulla B- Infundibulum C- Isthmus

#february2020usmle2ck Which of the following is the coagulation parameter affected by warfarin? A- Bleeding time B- Partial thromboplastin time (PTT) C- Prothrombin time (PT)

#february2020usmle2ck Which of the following is the most common complication of diverticulosis? A- Bleeding B- Diverticulitis C- Obstruction D- Perforation

#february2020usmle2ck Which of the following organs is the most commonly affected one by a blunt trauma to the abdomen? A- Large intestine B- Liver C- Small intestine D- Spleen

#february2020usmle2ck Which of the following substances increases absorption of iron in the intestine? A- Ascorbic acid B- Cyanocobalamin C- Folic acid D- Riboflavin

#february2020usmle2ck Which one of the following substances is used to acidify the urine? A- Acetazolamide B- Ammonium chloride C- Sodium bicarbonate

#february2020usmle2ck What is the pKa of a drug? A- The pH at which 100% drug becomes completely ionized B- The pH at which 100% drug becomes completely unionized C- The pH at which 50% of the drug is ionized and 50% unionized