BIO 132 – Anatomy and Physiology II

LECTURE 6: PHYSIOLOGY OF THE DIGESTIVE SYSTEM: ABSORPTION

Study Outline

6.1. Composition of Pancreatic Secretions:

a. 1.2-1.5 liters;

b. digestive enzymes; electrolytes; bicarbonate

c. pancreatic acinar; intercalated

d. Proteolytic; self-digestion; enterokinase; trypsin

e. Pancreatitis; trypsin

6.2. Regulation of Pancreatic Secretion:

a. cephalic; gastric; vagal

b. small intestine; fatty acids; amino acids; small intestine; acidic chyme

c. bicarbonate; enzymes

6.3. Composition of Bile:

a. hepatocytes; emulsification suspension of small fat droplets

b. bilirubin; large intestine; feces

c. reabsorbed

6.4. Regulation of Bile Secretion:

a. increase

b. stored; Oddi

c. vagal; increase

d. CCK; contract; relax; Secretin

e. Gallstones

f. blood; jaundice

6.5. Regulation of Intestinal Motility:

a. segmentation; migrating motility complexes (MMCs)

b. MMCs

c. parasympathetic; sympathetic

d. gastroileal; gastrin

e. mass movements

f. stretch (mechanoreceptors); internal anal; sigmoid colon; rectum; external anal sphincter

g. intraabdominal

6.6. Chemical Digestion in the Small Intestine:

a. amylase; amylase; disaccharides; sucrase; lactase; maltase

b. lactase

c. stomach; aminopeptidase; dipeptidase

d. lipases; oral cavity; stomach; pancreas

6.7. Absorption in the Small and Large Intestines:

a. fatty acids larger than 12 carbons and monoglycerides

b. lipid-soluble; A; D; E; K

c. fatty acids; monoglycerides; protein; lipoprotein lipase

d. small intestine

e. B; K

f. Motility; solute; water

g. Water; fiber