Digestion- foundation level

Page
5

Slide 38

Basic method

Put into a water bath for 2 minutes.

 37˚C or

 Different temperatures

Add drops of Amylase enzyme.

5 drops or

 Different number of drops

Start the stopwatch!

Slide 39

Graph

Number of drops

Or

Temperature

Time taken (s)

Work out the times taken for each experiment in seconds (remember there are 60 seconds per minute!) and put it in your results table

Work out the average time taken for each temperature/number of drops and put it in your results table

Plot a graph of your AVERAGE results only.

Slide 40

Tour guide

Mouth

Teeth √

Amylase enzyme (What are enzymes???)

Oesophagus

peristalsis

Stomach

Protease enzyme

Enzymes and pH

Pancreas

Amylase, Protease and Lipase Enzymes

Small intestine

Amylase, Protease and Lipase Enzymes

Absorption

Large intestine

egestion

Slide 41

Mouth: What happens

Food is crushed and ground up by teeth

The salivary glands make saliva which makes the food moist and easy for swallowing

Amylase enzyme (in saliva) breaks the carbohydrate starch down into glucose.

Slide 42

Tour guide

Mouth

Teeth √

Amylase enzyme (What are enzymes???) √

Oesophagus

peristalsis

Stomach

Protease enzyme

Enzymes and pH

Pancreas

Amylase, Protease and Lipase Enzymes

Small intestine

Amylase, Protease and Lipase Enzymes

Absorption

Large intestine

egestion

Slide 43

Swallowing and Peristalsis

Watch the animations and fill in your worksheet

Times GCSE Biology: Digestion: Page 13-14

http://www.hopkins-gi.org/multimedia/database/intro_250_Swallow.swf

Slide 44

Tour guide

Mouth

Teeth √

Amylase enzyme (What are enzymes???) √

Oesophagus

Peristalsis √

Stomach

Protease enzyme

Enzymes and pH

Pancreas

Amylase, Protease and Lipase Enzymes

Small intestine

Amylase, Protease and Lipase Enzymes

Absorption

Large intestine

egestion

Slide 45

Stomach

Stomach muscles contract and relax to mechanically break down the food

They also mix the food up with gastric juice and hydrochloric acid