Nutrition and digestion

Question 1

Define digestion

Answer 1

When the food we eat is broken down into nutrients the body can use

Question 2

Where does the digestive system begin and end

Answer 2

The mouth and the anus

Question 3

After we swallow food where does the food travel

Answer 3

Oesophagus, stomach, small intestine, large intestine

Question 4

What are the four steps of digestion

Answer 4

1) Food enters the mouth and is chewed
2) Digested food is absorbed into the bloodstream in the small intestine
3) Excess water is absorbed back into the body in the large intestine
4) Any undigested food is excreted

Question 5

What does the liver produce?

Answer 5

Bile to help with the digestion of lipids

Question 6

How does the pancreas help digestion?

Answer 6

Produced enzymes to speed digestive reactions

Question 7

What are enzymes?

Answer 7

Biological catalysts which speed reactions within the body

Question 8

What does amylase break down?

Answer 8

Starch into sugar

Question 9

What does protease break down?

Answer 9

Proteins into amino acids

Question 10

What does lipase break down?

Answer 10

Lipids into fatty acids glycerol

Question 11

Where are carbohydrates broken down?

Answer 11

Mouth stomach and small intestine

Question 12

What does saliva contain?

Answer 12

Amylase

Question 13

Where are proteins broken down?

Answer 13

Stomach and small intestines

Question 14

Where are lipids broken down?

Answer 14

Small intestine

Question 15

where are digested foods absorbed?

Answer 15

Small intestine

Question 16

How is the body adapted to absorb?

Answer 16

The body can only absorb small molecules into the bloodstream, the surface area of the small intestine is large and thin. The wall is one cell thick and covered with villi to give a large surface area

Question 17

What is Egestion?

Answer 17

When excess water is absorbed into the large intestine, the undigested food left is stored in the rectum, this then leaves as faeces