The Digestive System Flashcards
Substrate
The substance on which an enzyme acts is called the substrate
Product
The substance that is formed at the end of a reaction is called the product
Name an enzyme
Amylase
How the enzyme works
Amylase works on starch molecules by breaking it down into smaller units called maltose.
Stages in human nutrition
Eating, digestion, absorption, egestion
Digestion
Digestion is the breakdown of large, insoluble molecules into smaller, soluble molecules
Absorption
The digested food is taken into the bloodstream and carried to the cells where it is used
Egestion
Getting rid of undigested waste as faeces
Peristalsis
A series of wave like contractions that move food along the digestive system
Four types of teeth
Canine, molar, pre molar and incisor
The functions of teeth
Incisor - cutting and tearing food
Canine - cutting and tearing food
Pre molar - chewing and grinding
Molar - chewing and grinding
Enzyme
A biological catalyst
Mouth
Where food is chewed and mixed with saliva
Salivary gland
Produces saliva containing enzymes
Oesophagus
Carries food from mouth to stomach by muscular action
