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Biology Yr9 > Digestion > Flashcards

Flashcards in Digestion Deck (15):
1

Label the digestive system

Mouth
Epiglottis
Oesophagus
Diaphragm
Liver. Stomach
Gall bladder. Bile duct
Pancreas
Duodenum
Small intestine. Large intestine
Appendix
Rectum
Anus

2

What do carbohydrates do?

Provide energy

3

What does protein do?

Helps growth

4

What does water do?

Transports solvent

5

What does fibre do?

Prevents constipation

6

The presence of sugar can be confirmed by using _____________. If sugar is present this chemical will change from _____________ to _____________ whenever it is heated in a water bath.

Benedict’s reagent
Blue/green to brick red

7

Starch can be detected by using __________. __________ changes from ________ _________ to _______________ if starch is present.

Iodine
Iodine
Orange yellow to blue black

8

Biuret solution can be used to detect the presence of _________. ___________ will change the biuret solution from a light blue colour to a _________ colour.

Protein
Protein
Violet

9

State 2 things which happens to food in the mouth

Food is broken up by teeth and tongue
Saliva breaks food down

10

State 2 things which happens in the stomach

Acid breaks down food into smaller substances that can enter the blood stream

11

What is the correct order for digestion?

Ingestion
Digestion
Absorption
Assimilation
Egestion

12

What part of the digestive system does digestion start?

The mouth

13

What is peristalsis?

The muscular contractions that push food through the digestive system

14

What is the purpose of acid in the stomach

To kill germs and activate enzymes that digest protein

15

Which 3 features are found in the ileum to speed up absorption?

Long, thin walls covered in villi