Which hormone is the primary mediator for inducing gallbladder contraction and simultaneously relaxing the Sphincter of Oddi?
Show answer and explanation
Correct answer: Cholecystokinin
CCK is released by I-cells in the duodenum in response to fatty acids and amino acids. It coordinates bile delivery by contracting the gallbladder and relaxing the distal biliary sphincter (Oddi).
Keep practicing
More Motility and peristalsis questions
- The 'Law of the Gut' (Polarity of the intestine) primarily refers to the fact that:
- Which of the following will decrease the rate of gastric emptying?
- Secondary peristalsis in the esophagus is distinguished from primary peristalsis because it:
- Which movement is most responsible for the mixing of chyme with digestive enzymes in the small intestine?
- What characterizes 'mass movements' in the large intestine?
- The gastroileal reflex results in the relaxation of the ileocecal valve. What is the primary trigger for this reflex?