Human Nutrition (Digestion In The Mouth)

Question 1

What forms of digestion take place in the mouth?

Answer 1

Mechanical and physical digestion

Question 2

What mechanical digestion takes place in the mouth?

Answer 2

The chewing and grinding action of teeth on food

Question 3

What chemical digestion takes place in the mouth?

Answer 3

The action of the enzyme amylase

Question 4

What enzyme is found in the mouth that partakes in the chemical digestion of food?

Answer 4

Amylase

Question 5

What in the mouth is amylase found in?

Answer 5

Saliva

Question 6

What produces saliva in the mouth?

Answer 6

Three pairs of salivary glands

Question 7

Where are the three pairs of salivary glands which produce saliva in the mouth found?

Answer 7

Under the tongue, in the cheeks and at the back of the jaw

Question 8

What is saliva made of?

5

Answer 8

Water
Salts
Mucus
Lysozyme
Amylase

Question 9

What is mucus also called?

Answer 9

Mucin

Question 10

What is lysozyme?

Answer 10

An enzyme that destroys micro-organisms

Question 11

What enzyme which destroys micro-organisms is found in saliva?

Answer 11

Lysozyme

Question 12

What does saliva travel through to reach the mouth from the salivary glands?

Answer 12

Small tubes or ducts

Question 13

Where is the enzyme amylase active?

Answer 13

In the mouth

Question 14

What is the pH of the mouth?

Answer 14

It is close to seven

Question 15

What pH inhibits the enzyme amylase?

Answer 15

The acidic conditions (pH 2) of the stomach

Question 16

What does amylase break starch down to?

Answer 16

Maltose

Question 17

What does amylase break down to form maltose?

Answer 17

Starch

Question 18

What enzyme breaks down starch into maltose?

Answer 18

Amylase

Question 19

In the mouth, what does food form after both mechanical and chemical digestion has taken place?

Answer 19

Food forms a ball or bolus

Question 20

What happens to the bolus of food in the mouth after mechanical and chemical digestion has taken place?

Answer 20

It is pushed back into the pharynx which is connected to the oesophagus

Question 21

What is the flap which closes over the trachea called?

Answer 21

The epiglottis

Question 22

What is the epiglottis?

Answer 22

The flap which closes over the trachea which ensures food passes down the oesophagus