PHIS 206 1st EditionLecture 29Outline of Last Lecture I. Small IntestineII. Motilitya. Segmentationb. Peristalsisc. Muscularis Mucosa Contractiond. Migrating Motility (Motor) ComplexIII. SecretionIV. DigestionV. Further Digestion of Nutrients: Carbohydrates, Proteins, FatsVI. AbsorptionVII. DiarrheaOutline of Current Lecture I. 4 Processes of Large IntestineII. Motilitya. Haustral Contractionsb. Mass Movementc. Defecation ReflexIII. External Anal SphincterIV. Pre-Biotics + Pro-BioticsV. Absorption: What’s In Species?Current LectureI. 4 Processes of Large Intestine-Motility: haustral contractions, mass movement, defecation reflex-Secretion: alkaline mucus-Digestion: by bacteria in the lumen-Absorption: mostly sodium (ACTIVE) + water (PASSIVE)II. Motilitya. Haustral Contractions-main motility pattern in the colon-less frequent than the motility in the small intestine due to electrical smooth muscle-better reabsorption: colonic contents mixed with mucosab. Mass MovementThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-long peristalsis-get contents to distal proportion for storage-Gastrocolic reflex: mass movement triggered by food in stomachc. Defecation Reflex-smooth muscle and colon contract -sphincter (internal anal) relax-ONLY occurs when external anal sphincter relaxes-process easier by expiring and contracting abdominal musclesIII. External Anal Sphincter-“foundation of our social structure” -PriceIV. Pre-Biotics + Pro-Biotics-Pre-biotics: carbohydrates used to feed the beneficial bacteria of the gut b/c these carbs cannot be digested-Pro-biotics: eating healthy bacteria to help populate your gut (Lactobacillus, Bifidobacteria)V. Absorption: What’s In Feces?-Undigested food-Bacteria-Water (75%)-Bilial
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