2.Overview of Digestion
3.Putting It All Together: Digestion and Absorption
4.Circulation of Nutrients
5.Signaling Systems: Command, Control, Defense
6.Negative factors for digestion
7.Nutrition and GI Disorders
8.Time in mouth to colon
Hydrochloric acid
Prepares protein for digestion
Activates enzymes
Pepsin
Begins protein digestion
Gastric lipase
Some fat digestion
Gastrin (hormone)
Stimulates gastric secretion and movement
Intrinsic factor
Needed for absorption of vitamin B12
Small intestine
Sections of small intestine
Duodenum, jejunum, ileum
Digestion
Bicarbonate neutralizes stomach acid
Pancreatic and intestinal enzymes
Carbohydrates
Fat
Protein
Small intestine
Absorption
Folds, villi, and microvilli expandabsorptive surface
Most nutrients absorbed here
Fat-soluble nutrients go into lymph
Other nutrients go into blood

분야