Digestion

Question 1

What are the two types of digestion ?

Answer 1

Physical digestion- Teeth cutting and chewing food.
Chemical digestion -Saliva (contains enzymes) dissolving food.

Question 2

What do enzymes do?

Answer 2

Enzymes speed up a biochemical reaction - a biological catalyst

Question 3

What is the muscular tube that forces food down the stomach by movement?

Answer 3

A muscular tube that forces food down to the stomach by movement called peristalsis

Question 4

What is peristalsis ?

Answer 4

Peristalsis is muscular contractions in the oesophagus

Question 5

What does the Epiglottis do?

Answer 5

Prevents food/water going down the trachea (wind pipe)

Question 6

What is the stomach?

Answer 6

A muscular bag that traps food for a few hours

Question 7

What is the name of the acid in the stomach?

Answer 7

Hydrochloric acid

Question 8

What does the small intestine do?

Answer 8

• Nutrients are absorbed here into the blood stream.
• Amylase acts here to breakdown starch into maltose.

Question 9

What does the liver do?

Answer 9

1. Produces bile, which emulsifies fats (breaks them into small fat droplets).
2. Detoxifies the body.
3. Produces heat - body’s temperature is 37°C

Question 10

What is bile?

Answer 10

• Made in the liver.
• Stored in the gall bladder.
• Acts in the small intestine

Question 11

What does bile do?

Answer 11

1. Emulsifies fats to maximise surface area.
2. Contains a base to help neutralise stomach acid.

Question 12

What is the pancreas and what does it do?

Answer 12

• Leaf shaped gland.
• Produces amylase to help digest starch.
• Amylase passes from pancreas into small intestine

Question 13

What does the large intestine do?

Answer 13

Reabsorbs water from digested food and puts into the blood.