digestion - definitions Flashcards
1
Q
assimilation
A
small food molecules are used to build larger molecules (e.g. amino acids are used to synthesise proteins)
2
Q
absorption
A
small, soluble molecules move from small intestine into the blood
3
Q
ingestion
A
food enters digestive system via the mouth
4
Q
egestion
A
removal of undigested food (faeces) from anus
5
Q
digestion
A
break down of large, insoluble molecules into smaller, soluble molecules which can be absorbed
6
Q
order of digestion
A
mouth –> oesophagus –> stomach –> duodenum –> ileum –> colon –> rectum –> anus
7
Q
enzyme
A
speeds up the rate of reaction by lowering the activation energy needed for reactions to occur
