Digestive System

Question 1

Role of the mouth

Answer 1

Mechanical Breakdown - chewing
Chemical Breakdown - amylase enzyme in saliva breaking down starch
Sensing - potential threats (bad smells, mold)
Tasting - reward (endorphins)

Question 2

Role of the oesophagus

Answer 2

Transports food from the mouth to the stomach with the help of peristalsis

Question 3

Role of the pancreas

Answer 3

Produces digestive enzymes

Question 4

Role of the liver

Answer 4

Produces bile - neutralises pH for enzyme activity
- emulsifies fat

Question 5

Role of the stomach

Answer 5

Mechanical breakdown - churns food
Chemical breakdown - contains protease to breakdown proteins

Question 6

Role of the small intestine

Answer 6

Site of absorption

Question 7

Role of large intestine

Answer 7

Turns undigested food into faeces

Question 8

Role of the anus

Answer 8

Site of egestion - where faeces leave the body

Question 9

Ingestion

Answer 9

Taking in of food

Question 10

Digestion

Answer 10

Breaking down of food into small, soluble molecules

Question 11

Absorption

Answer 11

Food molecules passing from the small intestine into the bloodstream

Question 12

Assimilation

Answer 12

Using molecules from our food to build new cells and tissues

Question 13

Egestion

Answer 13

Removal of undigested food from the body as faeces

Question 14

Where is bile produced

Answer 14

Liver

Question 15

What is the role of bile

Answer 15

Neutralises pH for digestive enzymes

Emulsifies fat - breaks down large lipid fat droplets into smaller ones to increase the surface area for digestive enzymes

Question 16

How is the small intestine adapted for absorption

Answer 16

Villi and micro villi to increase surface area
Blood vessels surrounding it to make diffusion easy