Question

-Describe the three phases of digestion

-Describe the three phases of digestion

Homework Answers

Answer #1

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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