PATHOLOGY

Detailed explanation-1: -Contraction of the muscle wall in the gallbladder is stimulated by the vagus nerve of the parasympathetic system and by the hormone cholecystokinin, which is produced in the upper portions of the intestine. The contractions result in the discharge of bile through the bile duct into the duodenum of the small intestine.

Detailed explanation-2: -The gallbladder receives parasympathetic nerve supply from the right vagus through its hepatic branch; sympathetic supply comes from T 7-9 through the celiac plexus.

Detailed explanation-3: -The liver cells secrete the bile into small canals that lead to the common bile duct. From there, a smaller duct branches off and leads to the gallbladder.