-Describe the three phases of digestion
CEPHALIC PHASE: Activity: chewing, tasting, swallowing.
EFFECT: stimulates the CNS.
CVS ACTIVITY: Increases the celiac artery flow. However the duration of this phase is very less.
GASTRIC PHASE: ACTIVITY: Ingested food and drink causing stomach extension.
EFFECT: Stomach extension triggers mechanical receptors.
CVS ACTIVITY: increases the celiac artery flow.
DURATION: While ingesting and 15to30 minutes after ingestion.
INTESTINAL PHASE: ACTIVITY: Gastric emptying moves chyme into rhe duodenum.
EFFECT: Duodenal chyme elicits regulatory peptides.
CVS ACTIVITY: Increased superior mesentric artery flowm
DIRATION: typically 2 to 6 hrs, depending on the meal size.
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