During a surgical procedure to repair an abdominal aortic aneurysm, the surgeon must be careful to avoid injury to which of the following arterial structures that originates near the level of the renal vessels?
ALeft renal artery
BCeliac trunk
CRight renal artery
DSuperior mesenteric artery
An otherwise healthy 45-year-old man comes to the physician because of a painful ulcer on his tongue for 3 days. Examination shows a shallow, tender 5-mm wide ulcer on the lateral aspect of the tongue, adjacent to his left first molar. There is no induration surrounding the ulcer or cervical lymphadenopathy. A lesion of the cranial nerve responsible for the transmission of pain from this ulcer would most likely result in which of the following?
ALoss of taste from the supraglottic region
BLateral deviation of the tongue
CInability to wrinkle the forehead
DDecreased sensation in the upper lip
ELoss of sensation in the anterior two-thirds of the tongue
Nine healthy subjects participate in a study of gastric secretions. Subjects are asked to eat a meal at hour 0, at which time the pH of stomach contents and rate of stomach acid secretions are measured over the next 4 hours. Results of the study are shown. Which of the following mediators is most active at point A in the graph?
ASecretin
BAcetylcholine
CProstaglandin
DGlucose-dependent insulinotropic peptide
ESomatostatin
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