Digestion

Question 1

3 main groups of nutrients

Answer 1

Carbohydrates(glucose,starch etc) , protein and fats

Question 2

Name one physical and chemical breakdown

Answer 2

Teeth chewing food(physical) and saliva in mouth (chemical)

Question 3

What nutrients does saliva break down?

Answer 3

Carbohydrates due to salivary amylase

Question 4

3 main roles of the stomach

Answer 4

1.contracts muscular walls to push food around and mix it
2.produces pepsin(enzyme that breaks down protein)
3.produces hydrochloric acid (kills bacteria and provides good environment for pepsin)

Question 5

What is the role of the pancreas?

Answer 5

Release digestive juices to ease digestion

Question 6

Role of gall bladder?

Answer 6

Store bile, release bile

Question 7

What is bile role?

Answer 7

1.Neutralise acid from stomach(bile is an alkaline)
2. Break down fat to give fat bigger surface area

Question 8

Where is bile made?

Answer 8

Liver

Question 9

How is small intestine adapted to its function?

Answer 9

1.The villi in the small intestine increasing surface area making it easier to get nutrients into the bloodstream quick
2.villi have single layer of surface cells making diffusion happen over a short distance
3.very good blood supply to maintain concentration gradient

Question 10

What does large intestine do?

Answer 10

Absorb water from food

Question 11

Order of food digestion

Answer 11

Mouth,oesophagus,stomach,small intestine,large intestine and then rectum