B3.2 and 3.6 - The Human Digestive System (Finished)

Question 1

What does the liver do?

Answer 1

Produces bile

Question 2

What is bile for?

Answer 2

Bile neutralises stomach acid and emulsified fat

Question 3

What is the gall bladder for?

Answer 3

The gall bladder is where bile is stored before it is released into the small intestine

Question 4

What is absorbed in the large intestine?

Answer 4

Excess water

Question 5

What are 2 of the stomachs roles?

Answer 5

• pummels food with its muscular walls
• produces the protease enzyme, pepsin
• produces hydrochloric acid to kill bacteria and give the right ph for the protease enzyme to work

Question 6

What does the pancreas do?

Answer 6

It produces protease, amylase and lipase enzymes then releases them into the small intestine

Question 7

What is the small intestine for?

Answer 7

• Produces protease, amylase, lipase enzymes to complete digestion
• It is where digested food is absorbed out of the digestive system into the blood

Question 8

What are enzymes produced by an where from?

Answer 8

Specialised cells in glands or the lining of the digestive system

Question 9

Where are soluble food molecules absorbed into?

Answer 9

Your bloodstream

Question 10

What adaptions does the small intestine have to make digestion efficient?

Answer 10

• A large surface area
• Lots of villi
• Good blood supply
• Short diffusion distances

Question 11

What does amylase do and where is it produced from?

Answer 11

Amylase breaks down starch into sugars. It is produced in your salivary glands and in the pancreas

Question 12

What does protease do and where is it produced?

Answer 12

Protease is an enzyme that breaks down proteins into amino acids. They are produced in your stomach, pancreas and small intestine.

Question 13

What does lipase do and where does it come from?

Answer 13

Lipase enzymes are used to catalyse the reaction that breaks down lipids into fatty acids and glycerol. They are produced in your pancreas and small intestine.

Question 14

What are some adaptions of the digestive system to help enzymes?

Answer 14

• Breaks food up into small pieces to give enzymes a large surface area to work on
• Your food is mixed with digestive juices so enzymes can come in contact with as much as possible
• Different areas have different pH levels optimum for enzymes

Question 15

What are enzyme that break down carbohydrates called?

Answer 15

Carbohydrases

Question 16

Where does amylase act?

Answer 16

In your mouth and small intestine (coming from pancreas)

Question 17

Where does protease act?

Answer 17

In your stomach and small intestine

Question 18

Where does lipase act?

Answer 18

In your small intestine (coming from the pancreas)