The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 56-year-old man comes to the physician for a follow-up examination 1 week after a temporal artery biopsy was performed to evaluate headache and blurry vision. He has a 12-year history of hypertension treated with lisinopril. Results of the testing show decreased concentrations of arginine in vascular endothelial cells. Which of the following is the most likely explanation for this finding?   (A) Increased binding of calcium to calmodulin   (B) Increased phosphorylation of myosin   (C) Increased production of nitric oxide   (D) Decreased concentration of bradykinin
['(C) Increased production of nitric oxide <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Increased binding of calcium to calmodulin \n (B) Increased phosphorylation of myosin \n (C) Increased production of nitric oxide \n (D) Decreased concentration of bradykinin <> possible answers', '  A 56-year-old man comes to the physician for a follow-up examination 1 week after a temporal artery biopsy was performed to evaluate headache and blurry vision. He has a 12-year history of hypertension treated with lisinopril. Results of the testing show decreased concentrations of arginine in vascular endothelial cells. Which of the following is the most likely explanation for this finding? <> context@']