b2- digestive system

what 3 nutrients do food contain that are too large to be absorbed into the bloodstream,what are they broken down into by enzymes?

protein,carbohydrates,lipids are large molecules to be absorbed into the bloodstream so they break down into small molecules by enzymes

why do protein,carbs,lipids break into small molecules?

protein,carbs,lipids break into small molecules because large molecules are too large to be absorbed into the bloodstream

1st stage of digestion

first food is chewed in the mouth,enzymes in the saliva digest starch into small sugar molecules

2nd stage of digestion where does food travel to ,what happens in stomach

the food passes down the oesophagus into the stomach. in the stomach enzymes begin digestion of proteins

3rd stage of digestion waht stomach has

the stomach contains hydrochloric acid which helps enzymes digest proteins

4th stage of digestion

the churning action of stomach muscules turn food into a fluid increasing surface area for enzymes to digest

5th stage of digestion where fluid passes into,whats released from small intestine to 2 places

the fluid passes into the small intestine ,chemicals released into the small intestine from the liver and pancreas

6th stage of digestion what pancreas release,

the pancreas releases enzymes which continue the digestion of starch and protein,they start the digestion of lipids

7th stage of digestion lvier relases bile why

the liver releases bile to speed up digestion of lipids,bile neutralises acid released from the stomach

8th stage of digestion what do walls of small intesitne release

the walls of the small intestine release enzymes to continue digestion of protein and lipids

9th stage of digestion

small intestine is where soluble molecules are absorbed into the bloodstream by diffusion or active transport

10th stage of digestion

large intestine absorbs water from undigested food to produce faeces which is released out the body

what are proteins broken down by?

proteins are broken down by proteases

what do protease coverts proteins into?

protease converts proteins into amino acids

what enzyme is carbohydrates broken down by?

carbohydrates are broken down into carbohydrase (amylase)

what do lipase convert lipids into?

lipase convert lipids into fatty acids and glycerol

carbohydrases convert carbohydartes into?

carbohydrases convert carbohydartes into simple sugars