A. Mouth = Amylase C. Gastric = stomach Parietal Cells = HCl Chief Cells = pepsinogen Mucus Secreting Cells Gastrin Absorption water, some ions, aspirin.
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A. Mouth = Amylase
C. Gastric = stomachParietal Cells = HClChief Cells = pepsinogenMucus Secreting CellsGastrin Absorption water, some ions, aspirin and ethanol into blood
B. Esophagus = Peristalsisof bolus
Liver = secretes bileBile is stored = Gall Bladder
Pancreas = sodium bicarbonate;Amylase, lipase, trypsin, proteaseChymotrypsin, nucleases, Carboxypeptidase, IsletsOf Langerhans
D. Small Intestine = Digestion absorptionVilli and Microvilli
E. Colon = water and undigested1014 microorganisms; most areCommensals; 50% dry weight ofFeces bacteria
Hormones that control digestion Gastrin (stomach)…stomach acid and pepsinogen
Secretin (small intestine)…Stimulates bicarbonate production in pancreas…neutralize the acidic entering the small intestine.
CCK Cholecystokinin (small intestine)…Bile release from the gall bladder
Regulate appetiteGhrelin …stimulates appetite.
Peptide YY …response to a meal and inhibits appetite
Colon
10.0 L water per day…. 2.0 L from food …. 8.0 liters is from secretions into the gut…. Reabsorbs 95% of that water
Absorbs sodium and other ions Excretes other metallic ions Absorbs vitamin K produced by colon bacteria
Diarrhea can result if water is not absorbed…causing dehydration and ion loss
The last 20 cm of the large intestine is the rectum
Polyps …growths in the epithelial lining of the colon
…benign or malignant
…removed individually
…low-fat, high-fiber diet protection against colon cancer
One Medium-Sized Apple (5 ½ oz/160g)
Calories....................80 Dietary Fiber........5.0 grams Carbohydrate..........18 grams Fat..................0.0 grams Protein..............0.0 grams Cholesterol.............0.0 mg Sodium..................0.0 mg Vitamin C...............6.0 mg Potassium...............170 mg
"An apple a day keeps the doctor away."
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