USMLE

The innermost layer of a blood vessel is lined with _______ ______ cellsA . Simple squamousB . Stratified squamousC . Simple cuboidal epitheliumD . Stratified cuboidal epitheliumView AnswerAnswer: A

Which of the following is the approximate prevalence ratio for cystic fibrosis?A . 1: 25,000B . 1: 5,000C . 1: 2,000D . 1: 800View AnswerAnswer: C

Which of the types of RNA is the smallest?A . mRNAB . tRNAC . rRNAView AnswerAnswer: B

Which of the following is not considered a right of medication?A . DoseB . TimeC . RouteD . LimitView AnswerAnswer: D

Which of the following is the mRNA start codon in most cases?A . UAAB . AGUC . AUGD . UGAView AnswerAnswer: C

Which of the following is not a specific element of duodenal ulcers?A . Primarily affects malesB . Occasional malignancyC . Can lead to weight gainD . Affects people over 65View AnswerAnswer: D

Which of the following is not considered a major branch off of the femoral artery?A . Superficial pudendal arteriesB . Deep external pudendal arteriesC . Superficial circumflex iliac arteryD . Deep circumflex iliac arteryView AnswerAnswer: D

What type of cell releases glucagon?A . b cellsB . a cellsC . plasma cellsD . D cellsView AnswerAnswer: B

Which of the following is not a characteristic of Fabry's disease?A . X-linked diseaseB . Low levels of alpha-galactosidase AC . Profound muscular weaknessD . Increased levels of ceramide trihexosideView AnswerAnswer: C

Which of the following Vitamins is not stored in the Liver?A . Vitamin AB . Vitamin BC . Vitamin CD . Vitamin DView AnswerAnswer: C