USMLE

Maintenance of the corpus luteum during the first trimester of pregnancy is accomplished principally by the secretion of

A 52-year-old female presents with groin pain . Physical examination reveals a bulge in the groin area immediately inferior to the inguinal canal. The physician suspects that the patient has a femoral hernia containing a loop of small intestine. Which of the following structures is located immediately medial to the hernia sac?

The modified structures at the border of the epithelium shown above are immotile in a 23-year-old patient. Which of the following would be a consequence of this lack of motility?

A patient with tuberculosis develops bright orange-red urine and calls his physician in a panic because he is afraid he is bleeding into the urine. The patient has no other urinary tract symptoms. Which of the following medications is most likely to produce this side effect?

Which of the following Starling force changes is the primary cause of the edema seen in patients with nephrotic syndrome?

A 32-year-old, blood type A positive male receives a kidney transplant from a blood type B positive female donor with whom he had a 6-antigen HLA match. Once the kidney is anastomosed to the man's vasculature, the transplant team immediately begins to observe swelling and interstitial hemorrhage. After the surgery, the patient developed fever and leukocytosis and produced no urine. Which of the following is the most likely explanation?

A cardiovascular physiologist is performing experiments using a new alpha1 adrenergic agonist to determine the amount of vasoconstriction the new drug can produce compared with a phenylephrine control. Which of the labeled structures is the cellular target of both of these drugs?