Which function of the pancreas increases the release of bile from the gallbladder into the intestine?

AIIMS Raipur NO - 2019 (Shift-1)

Applied Physiology

Medium

Appeared in: AIIMS Raipur NO - 2019 (Shift-1)

Explanation

Cholagogue action specifically refers to the contraction of the gallbladder and relaxation of the sphincter of Oddi, leading to the release of stored bile.
This process is primarily mediated by the hormone cholecystokinin (CCK), which is released from the duodenum in response to dietary fats and amino acids.
CCK causes the gallbladder to contract, expelling bile into the common bile duct.
Although the question incorrectly attributes this to the pancreas, CCK also stimulates pancreatic enzyme secretion, linking the two digestive processes.
The term 'cholagogue' is derived from Greek: 'chole' (bile) and 'agogos' (leading), literally meaning 'bile-leading'.

Option A: Choleretic action refers to the stimulation of bile production in the liver, not its release from the gallbladder.
Option B: The hydrotropic effect is a chemical property of bile salts that allows them to dissolve fats in water. It describes what bile does, not what causes its release.
Option D: Emulsification is the physical process of breaking down large fat globules into smaller droplets, which is a primary function of bile after it has been released into the intestine.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of Biliary Secretion as background academic context rather than a clinical decision trigger.
Understanding the difference between cholagogue and choleretic actions is crucial for pharmacology, as drugs can target one or both mechanisms to treat biliary disorders.
In conditions like biliary sludge or small gallstones, a fatty meal can trigger a 'gallbladder attack' (biliary colic) because the CCK-induced contraction forces a stone against the gallbladder outlet, causing intense pain.
A nurse administering a HIDA scan (cholescintigraphy) may give intravenous CCK to assess gallbladder function. A low ejection fraction (poor contraction in response to CCK) indicates gallbladder disease (biliary dyskinesia).

How to Approach the Question

First, analyze the question's core request: it asks for the term describing the 'release of bile from the gallbladder'.
Break down the keywords: 'release', 'bile', 'gallbladder'. This points to a process of expulsion, not production or function.
Evaluate each option against this core request.
Recognize that 'Choleretic' relates to production (in the liver), and 'Emulsification' is a function of bile itself (in the intestine). This eliminates two options.
Differentiate between 'Cholagogue' and 'Hydrotropic'. 'Cholagogue' directly relates to leading/moving bile. 'Hydrotropic' is a chemical property.
Select 'Cholagogue action' as the best fit for promoting bile release, even if the question's premise about the pancreas is slightly inaccurate. A good strategy is to identify the most precise term for the physiological action described.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 2 p. 632-634

E6 Physiology Ganong 27e Vol 2 Part 1 pp. 60-62, 11-13