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Y10 digestion and teeth
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What is meant by emulsification of fats and why is it useful?
Turning large fat droplets into smaller ones - gives a large surface area to speed up lipase action
Where is maltase enzyme found?
On the membranes of the cells lining the small intestine
The softer part of the teeth under the enamel, has some nerves
Dentine
Where is lipase made, and where is it secreted into?
Made in the pancreas, secreted into the duodenum
Which teeth and used for crushing and grinding?
Pre-molars and molars
Which teeth are used for biting and cutting?
Incisors
Name 2 places that protease enzymes are made
Stomach and pancreas
What are the 2 sections of the small intestine
Duodenum (where digestion is completed) and ileum (where digested food is absorbed)
What does amylase break down, and what does it turn it into?
Starch into maltose
Give 2 functions of stomach acid
To kill bacteria (denatures their enzymes) and provide correct pH for pepsin
Give 2 functions of bile
To neutralise stomach acids, to emulsify fats
What is the name of the protease enzyme in the stomach?
Pepsin
Define chemical digestion
The breakdown of large, insoluble molecules into small, soluble molecules by enzymes
What are lipids broken down into
Fatty acids and glycerol
Moving digested food from the intestines into the blood is known as....
Absorption
What does maltase do?
Breaks down maltose into glucose
Why is it important to brush your teeth regularly?
To remove bacteria / plaque
Which chemical is added to toothpaste and some drinking water to help strengthen the enamel?
Fluoride
Which part of the tooth has blood vessels?
Pulp
The hard, tough white part of the teeth?
Enamel
What is formed as bacteria respire sugars?
Acid
The breakdown of food into smaller pieces without chemically changing it. What is this?
Mechanical digestion
Which enzymes are made in the pancreas?
Amylase, Trypsin and Lipase


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