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Question		Answer
What happens in the mouth? start learning		Food is chewed and mixed with saliva. Amylase begins starch digestion.
What does amylase do? start learning		Amylase breaks down starch into sugars.
What is the peristalsis? start learning		Wave-like muscle contractions that move food through the digestive system.
What happens in the stomach? start learning		The stomach churns food and uses hydrochloric acid and protease enzymes to digest proteins.
Why is hydrochloric acid important? start learning		It kills bacteria and provides the optimum acidic pH for stomach enzymes.
What do protease do? start learning		Proteases break proteins into amino acids
What does the liver do? start learning		The liver produces bile.
What is bile? start learning		An alkaline substance that neutralises stomach acid and emulsifies fats.
What does emulsify mean? start learning		Breaking large fat droplets into smaller droplets to increase surface area.
Why is bile important? start learning		It creates alkaline conditions for lipase and increases the rate of fat digestion.
What does the lipase do? start learning		Lipase breaks lipids into fatty acids and glycerol.
What does the pancreas do? start learning		The pancreas produces amylase, protease, and lipase enzymes.

Biology - Organs in the digestive system