The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 67-year-old man with chronic kidney disease comes to the physician because of worsening fatigue and shortness of breath on exertion for 6 months. He has a 20-year history of poorly-controlled type 2 diabetes mellitus. Current medications include metformin and insulin. His pulse is 105/min. Examination shows conjunctival pallor and bounding pulses. Laboratory studies show: Hemoglobin 8.6 g/dL Mean corpuscular volume 90 μm3 Reticulocyte count 0.5% Serum Ferritin 325 ng/mL Urea nitrogen 45 mg/dL Creatinine 2.2 mg/dL The patient is prescribed a drug to treat the cause of his current symptoms. The drug's mechanism of action directly involves which of the following signaling pathways?"   (A) PI3K/Akt/mTOR   (B) MAP kinase   (C) JAK/STAT   (D) IP3
['(C) JAK/STAT <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) PI3K/Akt/mTOR \n (B) MAP kinase \n (C) JAK/STAT \n (D) IP3 <> possible answers', '  A 67-year-old man with chronic kidney disease comes to the physician because of worsening fatigue and shortness of breath on exertion for 6 months. He has a 20-year history of poorly-controlled type 2 diabetes mellitus. Current medications include metformin and insulin. His pulse is 105/min. Examination shows conjunctival pallor and bounding pulses. Laboratory studies show:\nHemoglobin 8.6 g/dL\nMean corpuscular volume 90 μm3\nReticulocyte count 0.5%\nSerum\nFerritin 325 ng/mL\nUrea nitrogen 45 mg/dL\nCreatinine 2.2 mg/dL\nThe patient is prescribed a drug to treat the cause of his current symptoms. The drug\'s mechanism of action directly involves which of the following signaling pathways?" <> context@']