This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': 'Maximum potassium ions secretion is seen in \nSelect and explain. \nA. Saliva, B. Gastric secretions, C. Jejunal secretions, D. Colonic secretions', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Saliva Maximum potassium secretion are: (1) Colon & rectum = 85 meq/l (2) Saliva = 25 meq/l (3) Others = 5 meq/l Now if we look at the total secretions: Colonic secretions = 200 ml/day so Potassium = 17 meq/day Salivary secretions = 2 litres/day so potassium = 50 meq/day Others = 5-6 litres/day so potassium = 25-30 meq/day But since colon excretes body fluids and saliva secretes body fluids: Max daily potassium secretion is Saliva Max daily potassium excretion is Colon. Ref: guyton and hall textbook of medical physiology 12 edition page number: 400,401,402', 'role': 'assistant'}]