Which of the following is the strongest cholagogue?: (A) Vagus nerve/Ach, (B) Cholecystokinin, (C) Bile acids, (D) Secretin
Answer is B. Cholagogues are the substances that increase the bile flow by causing gall bladder contraction. CCK is a cholagogue. Vagus nerve, bile acids are choleretics; they increase the bile secretion from liver.