2 Organisation - Digestive System Flashcards Preview

AQA Biology Paper 1 11-1A > 2 Organisation - Digestive System > Flashcards

Flashcards in 2 Organisation - Digestive System Deck (69)
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1

Define 'tissue'.

A group of cells with similar structure working together for a specific function

2

Define 'organ'.

A group of tissues working together for specific functions

3

Reorder the following in increasing size order: Organ, cell, tissue, organ system, organism

Cell < Tissue < Organ < Organ system < Organism

4

State the function of the salivary glands.

Produce digestive enzymes (eg. Amylase)

5

Name the tube that carries food from the mouth to the stomach.

Oesophagus/Gullet

6

State the function of the stomach.

Releases digestive enzymes to digest food

7

State the function of the liver in the digestive system.

Produces bile for lipid digestion

8

State the function of the small intestine.

Digest food and absorb nutrients from digested food

9

State the function of the large intestine.

Absorb water from digested food

10

State the the function of the pancreas.

Produces/Releases digestive enzymes

11

State the function of the gall bladder.

Store bile before release into small intestine

12

What are carbohydrates made up of?

Simple sugars

13

State the chemical formula of glucose.

C6H12O6

14

Name a complex carbohydrate that is made up of glucose.

Starch/Cellulose/Glycogen

15

State the importance of having carbohydrates in our diet.

Energy source - Break down glucose in respiration to release energy for metabolic reactions

16

What elements make up carbohydrates?

C, H, O

17

What are lipids made up of?

1 glycerol + 3 fatty acids

18

State the importance of having lipids in our diet.

Energy store/Make up cell membranes/Steroid hormones

19

What elements make up lipids?

C, H, O

20

What are proteins made up of?

Amino acids

21

State the importance of having proteins in our diet.

Structural components/Hormones/Antibodies/Enzymes

22

What elements make up proteins?

C, H, O, N

23

Name the reagent used to test for starch.

Iodine

24

What is a positive result for starch test?

Starch turns iodine from brown-red to blue-black

25

Name the reagent used to test for sugars.

Benedict's solution

26

What is the positive result for sugars?

Benedict's solution turn from clear blue to brick-red (precipitate)

27

What is the reagent used to test for proteins?

Biuret solution

28

What is the positive result for proteins?

Biuret turns from blue to purple

29

What is the reagent used to test for lipids?

Ethanol (+water)

30

What is the positive test for lipids?

White milky layer