2.2.1 The Digestive System

Question 1

Teeth

Answer 1

Physically digest food

Question 2

Salivary glands

Answer 2

Lubricate food and contains amylase

Question 3

Oesophagus

Answer 3

Food is passed down

Question 4

Stomache

Answer 4

Churns up the food and produces digestive juices

Question 5

Pancreas

Answer 5

Produces enzymes that are released into the small intestine

Question 6

Small intestine

Answer 6

Produces digestive enzymes
Absorbs molecules

Question 7

Liver

Answer 7

Bile is made here

Question 8

Gall bladder

Answer 8

Stores bile

Question 9

Large intestines

Answer 9

Reabsorbes watef

Question 10

Large intestines

Answer 10

Reabsorbes water

Question 11

Rectum

Answer 11

Stores waste

Question 12

Adaptations of small intestine

Answer 12

Villi: finger like projections that further increase surface area
Microvilli: Cells covering the villi that have tiny folds to increase the surface area
Mitochondria: Provide energy to enable substances to be absorbed by active transport
Long length
High fold surface to increase surface area

Question 13

Adaptations of villi

Answer 13

-Rich blood supply to maintain a steep concentration gradient for diffusion
-Large surface area for diffusion
-Thin walls, so there is a short distance for diffusion

Question 14

Uses of sugars

Answer 14

Used to build new carbohydrates in cells

Question 15

Uses of fatty acids and glycerol

Answer 15

To build new fats in our cells

Question 16

Uses of amino acids

Answer 16

To build new protein