The Human Digestive System (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Practise the cards
15 cards from this deck
Role of digestive system
Role of digestive system
Breaks down food into smaller, soluble molecules
What do glands produce?
What do glands produce?
Digestive juices containing enzymes
What does the stomach produce?
What does the stomach produce?
Hydrochloric acid
Two roles of HCl in stomach
Two roles of HCl in stomach
Kills bacteria & creates acidic environment for pepsin
Where absorption of soluble molecules occurs
Where absorption of soluble molecules occurs
Small intestine
What does the liver produce?
What does the liver produce?
Bile
What does the large intestine absorb?
What does the large intestine absorb?
Water
Definition of enzymes
Definition of enzymes
Biological catalysts
Optimum temperature for enzymes
Optimum temperature for enzymes
37°C
Effect of very high temperature on enzymes
Effect of very high temperature on enzymes
Denatured - active site shape changes
What amylase breaks down
What amylase breaks down
Starch into maltose
What proteases convert
What proteases convert
Proteins into amino acids
What lipases convert
What lipases convert
Lipids into fatty acids and glycerol
Benedict's test positive result
Benedict's test positive result
Brick red colour
Iodine test positive result
Iodine test positive result
Blue-black colour