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GI Physiology II (Part 2) - Coggle Diagram
GI Physiology II (Part 2)
Gastric Motility
Mixing and Digestion
Emptying (spurts)
Small intestine
Ileocecal Valve
Contraction when feces enters cecum of colon
Relaxation when feces enters ileum of SI
Propulsion
Grinding and Mixing
Retropulsion
Gastric distention
Pathophysiology
Gastroparesis
Impaired gastric emptying
Pyloric stenosis
Thick pylorus muscle :arrow_right: regurgitation and vomiting
Receptive relaxation
MMC
Emptying of stomach and small intestine during fasting
Purpose: Preps for next meal (housekeeping role)
Vomiting
Vomiting Center
Chemoreceptor trigger zone
Stimulants (Triggers)
Higher Brain areas
Baro- and Chemoreceptors
CTZ
Pain receptors
Chemicals
Gastric/duodenal irritation
Vestibular nuclei (Motion sickness)
Colon motility
Defecation
Somatic Motor Control (Voluntary)
Aids
Deep inspiration
Abdominal contraction
Closure of glottis
Opening of the EAS via pudendal nerve
Enteric and Parasympathetic reflex (Involuntary)
Gastrocolic reflex and Ileocecal reflex
Haustration
Contractions of taenia coli and CM
MIXING MOTILITY
Mass movement
PROPULSIVE MOTILITY
Infrequent but moves a lot of fecal matter
Colon Functions
Fluid and Electrolyte absorption
Fecal storage; caudal end