Digestive system Flashcards
What is the digestive system?
An organ system
How does the digestive system work and what does it do?
Several organs work together to digest and absorb nutrients
What are enzymes? List 2 things
- Specialised proteins used in the digestive system
- Biological catalysts
What can enzyme function be described as?
The ‘lock and key model’
What does the substrate bind to?
The active site on the enzymes
When does an enzyme denature?
When the active site changes and the substrate can no longer bind to the enzyme
What denatures enzymes? List 2 things.
- High temperatures
- Wrong ph
Carbohydrase enzymes break down _____________ ?
Carbohydrates into simple sugars
What is amylase and what does it do?
A type of carbohydrase which breaks down starch into sugars
Lipase breaks down ________?
Fats into fatty acids and glycerol
Protease enzymes break down ___________?
Protein into amino acids
Where is bile stored?
In the gall bladder
Where is bile made?
In the liver
What does bile do?
Neutralises substances from the stomach and helps to emulsify fats
What does iodine test for?
Starch
