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Medicine (MD/DO)
Fundamentals of Gastrointestinal Physiology

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Physiology | Medicine (MD/DO) School Study Aid

Fundamentals of Gastrointestinal Physiology
4 Picmonics to Learn | 10 mins
Cholecystokinin (CCK)
Secreted by I Cells
Duodenum and Jejunum
Increase Pancreatic Secretions
Increase Gallbladder Contraction
Induce Relaxation of Sphincter of Oddi
Decrease Gastric Emptying
Increased by Fatty Acids and Amino Acids
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1 min
Secreted by D Cells
GI Tract
Decrease Secretion of Gastric Acid and Pepsinogen
Decrease Pancreatic and Small Intestine Fluid Secretion
Decrease Gallbladder Contraction
Decrease Glucagon and Insulin Secretion
Secretion is Increased by Acid
Secretion is Decreased by Vagal Stimulation
Clinical Use
Carcinoid Syndrome
Variceal Bleeds
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2 mins
Synthesis and Circulation
Synthesized Continuously By Hepatocytes
Cholesterol 7 Alpha-Hydroxylase Rate Limiting Step
Stored In Gallbladder
Secreted Into Duodenum
Bile Salts Reabsorbed In Terminal Ileum
Returned To Liver Via Portal Circulation
Bile Salts
Cholesterol And Phospholipids
Ions And Water
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4 mins
Secreted from S Cells in Duodenum
Stimulated by Fatty Acids in Duodenum
Increases Bicarbonate Secretion
Increases Bile Acid Secretion
Decreases Gastric Acid
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2 mins

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