Digestion part two Flashcards
Why doesnt the stomach digest itself
Mucus prevents gastric juices from eating the stomach
Pepsin will not work without gastric juices
Gastric juice will not be made until food is there
Pepsinogen
HCL acid and pepsin mixed
What is another word for HCL
Gastric juices
What is chyme
Gastric juices and food mixed
What does the stomach absorb in small amounts
Anti inflamitiory medicine
Water
Alchol
Salts
Pyloric spincter
Controls the exit of chyme into the small intestine
What does the small intestine do
4x the length of the large inestine
digest macromolecules
absorb componet subunits
What are the three regions of the small inestine
Duodenum
Jejumun
ileum
Duodenum
25cm shortest part of the small inestine
Site of chemical digestion from chyme
Jejuimin
2.5m countiues to break down food
ileum
3m. Few villi absorb some and push undigested food into the large inestine.
Villis
Has capalaris and lymph vessiles and absorb stuff taking it to the blood stream and lymphatic system
Accesory organs
Pancreas
Liver
Gall bladder
List pancreas fluid
Trypisn and chymotrypsin
Panceratic amylase
Lipases
Bicarbonate
helps neutralize HCL acid and give a higher pH to chyme entering the duoenium (8)
Liver
Produces bile
Bile salts emuslifing fats
Bile salts
Emulsify fats
Gall blader
Stores bile
Chyme in the duodenum helps close it
How is the gall bladder closed
Chyme in the duodum helps it contract and open
Absorbtion
Mostly takes place in small intestine
Capillaries
Absorb carbohydrates and amino acids
Lymph vessiles
Absorb fats
How is glucose actively transported
Through active trasnport and goes into blood stream and to the liver
How is amino acids actively trasnported
Through active transport and goes into the blood stream and to the liver
How is glycerol and 3 fatty acids absorbed
Through diffusion and are coated with protein and remade into fats. Then go to the lymph vessiles and to the chest area
How is the small intestine regulated
Nervous and endcrine system (hormones)
What does the large intesine
Wider
Elimates waste
Stores waste
Absorbs water
Bacteria that synthesis vitmain B
12 and K
Buildup of waste in colon trigger
How are feeces created
Formed by remaining indigestable materials
What does the rectuim do
Stores feeces
What are pigments in bile
Are what give feeces their chcacteristic brown colour
