Food Digestion Flashcards
What does the process of breaking down food involve?
Ingestion, digestion, absorption, assimilation and egestion
What does bile do?
Neutralises stomach acid and emulsify fats
What do the villi do?
Increase the surface area available for digested food molecules in the small intestine
What is digestion?
The breakdown of large insoluble molecules to smaller soluble ones
What is the alimentary canal?
A muscular tube which runs from your mouth to your anus
How does food moves through your gut?
Waves of muscular contraction. This is called peristalsis.
What is the function of the stomach?
A muscular bag which contains gastric juice of hydrochloric acid and pepsin
What happens in the small intestines?
In the duodenum secretion from the pancreas and liver are received, it breaks down food using enzymes. Absorption takes place in the ilium to the blood via the villi. The ilium absorbs digested food.
What does the pancreas do?
Produces pancreatic juices containing, amylase, trypsin and lipase
Test for glucose
Benedict’s regent, will turn from light blue to brick red
Test for starch?
Iodine solution will turn from orange brown to blue blue
Test for protein?
Biuret reagent will turn from light blue to lilac
What is assimilation?
Food molecules distributed around the body
What is bile?
A yellow liquid stored in gall bladder, made in the liver which turns lipids into an emulsion of tiny droplets. It is also alkaline to neutralise the stomach acids.
Where does the cellulose and dead bacteria go?
The colon
