The Human Digestive System (AQA GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
Digestive system definition
Digestive system definition
Organ system with organs working together to break down food
Why food must be broken down
Why food must be broken down
To make small, soluble molecules cells can absorb
What stomach produces
What stomach produces
Hydrochloric acid
Two purposes of stomach acid
Two purposes of stomach acid
Kills bacteria & creates acidic pH for pepsin
Where absorption of soluble molecules occurs
Where absorption of soluble molecules occurs
Small intestine
What liver produces
What liver produces
Bile
What large intestine absorbs
What large intestine absorbs
Water
Enzymes definition
Enzymes definition
Biological catalysts that speed up reactions without being used up
Optimum temperature for enzymes
Optimum temperature for enzymes
What happens when enzymes get too hot
What happens when enzymes get too hot
Denatured - active site shape changes
What amylase breaks starch into
What amylase breaks starch into
Maltose
What proteases convert proteins into
What proteases convert proteins into
Amino acids
What lipases break lipids into
What lipases break lipids into
Fatty acids and glycerol
Benedict's test positive result
Benedict's test positive result
Turns brick red (indicates sugars)
Two functions of bile
Two functions of bile
Neutralises acid & emulsifies fats