The Digestive System: Part B - Next2Eden

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Regulation of Gastric Emptying • As chyme enters the duodenum • Receptors respond to stretch and chemical signals • Enterogastric reflex and enterogastrones inhibit gastric secretion and duodenal filling • Carbohydrate-rich chyme moves quickly through the duodenum • Fatty chyme remains in the duodenum 6 hours or more Copyright © 2010 Pearson Education, Inc.
Initial stimulus Physiological response Result Copyright © 2010 Pearson Education, Inc. Duodenal stimuli decline Presence of fatty, hypertonic, acidic chyme in duodenum Duodenal entero- endocrine cells Enterogastrones (secretin, cholecystokinin, vasoactive intestinal peptide) Chemoreceptors and stretch receptors Secrete Target Via short reflexes Enteric neurons Contractile force and rate of stomach emptying decline Via long reflexes CNS centers sympathetic activity; parasympathetic activity Stimulate Inhibit Figure 23.20
Page 1 and 2: Copyright © 2010 Pearson Education
Page 3 and 4: Esophagus • Flat muscular tube fr
Page 5 and 6: Digestive Processes: Mouth 1. Inges
Page 9 and 10: Relaxed muscles Circular muscles co
Page 11 and 12: Stomach: Gross Anatomy • Cardiac
Page 13 and 14: Stomach: Gross Anatomy • Two mese
Page 15 and 16: Liver Gallbladder Lesser omentum St
Page 17 and 18: Stomach: Microscopic Anatomy • Fo
Page 19 and 20: Stomach: Microscopic Anatomy • Mu
Page 21 and 22: Gastric Glands • Cell types • M
Page 23 and 24: Gastric Gland Secretions • Glands
Page 25 and 26: Gastric Gland Secretions • Entero
Page 27 and 28: Homeostatic Imbalance • Gastritis
Page 29 and 30: Digestive Processes in the Stomach
Page 31 and 32: Cephalic phase Gastric phase Intest
Page 35 and 36: Gastric Contractile Activity • Pe
Page 37: Pyloric valve closed 1 Propulsion:
Page 41 and 42: Mouth (oral cavity) Tongue Esophagu
Page 43 and 44: Mucosa with folds Gallbladder Major
Page 45 and 46: Structural Modifications • Circul
Page 47 and 48: Structural Modifications • Villi
Page 49 and 50: Intestinal Crypts • Intestinal cr
Page 51 and 52: Submucosa • Peyer’s patches pro
Page 53 and 54: Liver • Largest gland in the body
Page 55 and 56: Sternum Nipple Liver Lesser omentum
Page 57 and 58: Mucosa with folds Gallbladder Major
Page 59 and 60: (a) (b) Lobule Central vein Connect
Page 61 and 62: Sinusoids Plates of hepatocytes (c)
Page 63 and 64: Bile • Yellow-green, alkaline sol
Page 65: The Gallbladder • Thin-walled mus

The Digestive System: Part B - Next2Eden

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