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Review article: control of gall-bladder motor function.

E A Shaffer1

  • 1Department of Medicine, University of Calgary, Faculty of Medicine, Foothills Medical Center, Alberta, Canada. eldon.shaffer@crha-health.ab.ca

Alimentary Pharmacology & Therapeutics
|July 21, 2000
PubMed
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Gallbladder contraction, regulated by hormones like cholecystokinin, controls bile delivery. This process involves coordinated pressure changes and muscle activity, ensuring bile reaches the duodenum for digestion.

Area of Science:

  • Gastroenterology
  • Physiology

Background:

  • Bile secretion by the liver and its subsequent delivery to the duodenum are critical for digestion.
  • The gallbladder plays a key role in storing, concentrating, and releasing bile.

Purpose of the Study:

  • To elucidate the physiological mechanisms governing gallbladder contraction and bile delivery.
  • To understand the roles of hormonal and neural factors in regulating gallbladder function.

Main Methods:

  • The study reviews the physiological processes involved in bile flow regulation.
  • It examines the pressure dynamics within the biliary system and the roles of the gallbladder, cystic duct, and sphincter of Oddi.
  • Hormonal and neural signaling pathways influencing gallbladder motility are discussed.

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Main Results:

  • Gallbladder contraction is the primary driver of bile delivery into the duodenum.
  • Sphincter of Oddi tone and gallbladder compliance are crucial for bile storage and release.
  • Hormones like motilin (during fasting) and cholecystokinin (during eating) orchestrate gallbladder emptying.
  • Signal transduction pathways involving intracellular calcium levels mediate gallbladder smooth muscle contraction.

Conclusions:

  • Gallbladder function is a complex interplay of mechanical, hormonal, and neural factors.
  • Effective bile delivery is essential for maintaining the enterohepatic circulation of bile salts and aiding digestion.
  • The coordinated actions of the gallbladder and sphincter of Oddi ensure timely bile release into the gastrointestinal tract.