Enzymes And Digestion Flashcards
Job of oesophagus…
Carries food from mouth to the stomach
Job of the stomach…
Muscular sac with inner layer that produces enzymes
Store and digest food
Job of ileum…
Long muscular tube
Secrets enzymes to aid digestion
Absorbing products from the blood stream
Job of large intestine…
Absorbs water
Job of rectum…
Faeces are stored here and are removed by egestion.
Job of salivary glands…
Secrete amylase which hydrolyses starch into maltose
Job of pancreas…
Secretes professes fo hydrolyse proteins, lipase to hydrolyse lipids and amylase to hydrolyse starch
What is digestion?
Physical breakdown and chemical breakdown
How is physical breakdown of food done?
Grinding of teeth
Explain carbohydrate digestion
Amylase produced in mouth and pancreas which hydrolyses starch Enters stomach Acid denatured amylase Pancreatic amylase continues digestion Maltese hydrolyses the maltose
Sucrose hydrolyses sucrose - glucose and fructose
Lactase hydrolyses lactose - glucose and galactose
Explain lipid digestion
Ester bond hydrolysed by lipases
Lipids split into tiny droplets called micelles by bile salts in a process of emulsification (increases SA)
Explain protein digestion.
Endopeptidases hydrolyse peptide binds In central region
Exopeptidases hydrolyse terminal amino acids
Dipeptidases hydrolyse the bond between two amino acids
