3.3 Break it down!

3.3 Break it down!
1 / 20
suivant
Slide 1: Diapositive
BiologieMiddelbare schoolhavoLeerjaar 3

Cette leçon contient 20 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.

time-iconLa durée de la leçon est: 50 min

Éléments de cette leçon

3.3 Break it down!

Slide 1 - Diapositive

Why should pregnant women eat a lot of protein?

Slide 2 - Question ouverte

Which of the following is not a function of fat?
A
Protect inner organs
B
Help to absorb vitamins
C
Building block
D
Protect against disease

Slide 3 - Quiz

Which of these food products are high in protein?
A
Salmon
B
Vegetable oil
C
Blueberries
D
Oatmeal

Slide 4 - Quiz

What tips could you give someone who wants to have a healthy diet?

Slide 5 - Question ouverte

Learning goals
You will know..
  • What the four stages of food processing are.
  • What enzymes are.
  • Why we need enzymes. 

Slide 6 - Diapositive

ingestion-digestion-absorption-elimination
Ingestion: placing food in mouth
Digestion: making food particles smaller
              - mechanical/chemical
Absorption: smal particles go into blood
Elimination: get rid of waste products 

Slide 7 - Diapositive

digestion
mechanical => chewing
chemical  => breaking food down using enzymes

Slide 8 - Diapositive

enzymes 
substrate is broken down

Slide 9 - Diapositive

Slide 10 - Diapositive

Chemical digeston step 1: 
  • the place: the mouth (oesophagus)
  • the enzyme: amylase
  • the liquid: saliva
  • the nutrient: carbohydrates
  • the products: glucose & maltose

  • The enzymes in your saliva start breaking down the carbohydrate molecules into maltose and glucose.

Slide 11 - Diapositive

Chemical digeston step 2: 
  • the place: the stomach
  • the enzyme: protease
  • the liquid: chyme and hydrochloric acid
  • the nutrient: proteins
  • the products: amino acids

  • The enzymes in your chyme start breaking down the protein molecules into amino acids.

Slide 12 - Diapositive

Before chemical digeston step 3: 
  • the place: liver
  • the enzyme: none
  • the liquid: bile
  • the nutrient: fats

  • Bile is an alkalyne and neutralises the acid in the chyme. (drops the pH).
  • Bile emulsifies (breaks chemical bonds) fats.

Slide 13 - Diapositive

Chemical digeston step 3: part A
  • the place: the duodenum
  • the enzyme: lipase
  • the liquid: chyme and bile
  • the nutrient: fats
  • the products: fatty acids and glycerol

Slide 14 - Diapositive

0

Slide 15 - Vidéo

Closing

Homework:
Next lesson: 
Learning goals achieved?
- What are the four stages of food processing.
- What are enzymes.
- Why do we need enzymes. 

Slide 16 - Diapositive

Ingestion
Mechanical digestion
Chemical digestion
MOVING THE FOOD INTO YOUR MOUTH
BREAKING THE FOOD INTO SMALLER PIECES.
THIS IS DONE BY YOUR TEETH
BREAKING THE FOOD INTO EVEN SMALLER PIECES.
USING ENZYMES TO BREAK DOWN THE FOOD MOLECULES. 

Slide 17 - Question de remorquage

What is the end product matching the enzyme called 'protease'?
A
Amino acids
B
Protein
C
Fatty acids
D
Nutrients

Slide 18 - Quiz

Fases of digestion. Put them in the right order.
1
2
3
4
digestion
ingestion
absorption
egestion

Slide 19 - Question de remorquage

What is the difference between mechanical and chemical digestion?

Slide 20 - Question ouverte