Scince Test 2

Question 1

Mouth

Answer 1

The mouth digests food with amylose which is an enzyme that turns food into maltose

Question 2

Teeth

Answer 2

INCISORS: cut into food
CANINES: grip/tear food
PREMOLARS AND MOLARS: grind/crush food

Question 3

Oesophagus

Answer 3

Is a muscular pipe that pushes down food to the stomach by peristalsis

Question 4

Stomach

Answer 4

Is a muscular bag that churns food and adds Hydrochloric Acid (HCI) to kill bacteria

Question 5

Small intestine

Answer 5

Long narrow tube
It digest food by enzymes and bile
It also takes all the nutrients out of the small intestine

Question 6

Large intestine

Answer 6

Is shorter but wider
It reabsorbs water it leaves a semi solid faeces which starts in the rectum and it is egested through the anus

Question 7

Liver

Answer 7

Makes bile to break down fats

Question 8

Pancras

Answer 8

Makes enzymes which chemically digests food in the small intestine

Question 9

Name the 5 steps in the food path

Answer 9

Ingestion
Digestion
Absorption
Assimilation
Egestion

Question 10

What are the 3 main reasons we need food

Answer 10

To give us energy, to provide the raw materials for growth and to allow us to repair the body

Question 11

Define the term chemical digestion

Answer 11

Chemical digestion is the breakdown of food using enzymes (or hydrochloric acid in the stomach).

Question 12

Define the term enzyme

Answer 12

An enzyme is a chemical (made of protein) produced by the body that speeds up chemical reactions in the body without the enzyme being used up.

Question 13

Tell me about the digestive process

Answer 13

Food is broken down by the teeth in the mouth and enzyme amylase in saliva. The food travels to the stomach and is dissolved by HCl. The small intestine absorbs the nutrients into the blood. The blood carries the nutrients to the body cells. The nutrients enter the body cells and the mitochondria converts the nutrients to energy by means of respiration.