In deze les zitten 36 slides, met interactieve quizzen, tekstslides en 1 video.
Lesduur is: 30 min
Onderdelen in deze les
Digestion
Bricks 3.3 + 3.4
Slide 1 - Tekstslide
Digestion
Digestion: Breakdown of food molecules into small food molecules
When food is digested it is absorbed
Slide 2 - Tekstslide
Big vs. Small
Big molecules -> Insoluble can not get through the gut wall (go out)
Small molecules -> Soluble can get through the gut wall
Slide 3 - Tekstslide
Fases of digestion. Put them in the right order.
1
2
3
4
digestion
ingestion
absorption
elimination
Slide 4 - Sleepvraag
FASES OF DIGESTION:
INGESTION
CHEMICAL AND MECHANICAL DIGESTION
ABSORPTION
ELIMINATION
Slide 5 - Tekstslide
Slide 6 - Tekstslide
Slide 7 - Tekstslide
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 8 - Sleepvraag
CHEMICAL DIGESTION:
BREAKING THE FOOD INTO EVEN SMALLER MOLECULES.
USING ENZYMES TO BREAK DOWN THE FOOD MOLECULES.
Slide 9 - Tekstslide
3.4 organising digestion
- the organs and their function in the digestive system
- peristalsis, digestion, emulsification
- digestive juices and their function
Slide 10 - Tekstslide
Chemical digestion
Enzymes: Important chemicals
Slide 11 - Tekstslide
Slide 12 - Tekstslide
Chemical digestion Step 1: mouth
starts in: the mouth
the enzyme: amylase (a carbohydrase)
the liquid: saliva
the nutrient: carbohydrates
the products: glucose
The enzymes in your saliva start breaking down the carbohydrate molecules into glucose.
Slide 13 - Tekstslide
Down the tube!
Oesophagus
Peristalsis: moving food down your oesaphagus (gullet)
Slide 14 - Tekstslide
Why is your stomach rumbling?
-peristalsis, muscle activity
- mechanical digestion
-Empty stomach and intestines make a louder sound!
Slide 15 - Tekstslide
Step 2: stomach
Digestive juices are added
Proteases -> digestion proteins -> amino acids
Hydrochloric acid -> acid PH, best for the enzymes + acidic environment also kills germs
Rennin (only babies) makes milk solid, stays in the stomach longer
Slide 16 - Tekstslide
duodenum
salivary gland
liver
pancreas
gall bladder
small intestine
large intestine
stomach
oesophagus
rectum
appendix
pancreatic duct
anus
Slide 17 - Sleepvraag
Amylase is an example of a
A
Carbohydrase
B
Lipase
C
Protease
Slide 18 - Quizvraag
After breaking down of proteins you get:
A
glucose
B
amino acids
C
fatty acids
D
glycerol
Slide 19 - Quizvraag
The environment of the stomach is
A
Acidic
B
Alkaline
C
Neutral
Slide 20 - Quizvraag
After breaking down fats you get:
Slide 21 - Open vraag
3.4
practice makes perfect
Slide 22 - Tekstslide
3.4 organising digestion part 2
- the organs and their function in the digestive system
- peristalsis, digestion, emulsification
- digestive juices and their function
Slide 23 - Tekstslide
Slide 24 - Tekstslide
inactive enzyme pepsinogen
active enzyme pepsin
Slide 25 - Tekstslide
Step 3: duodenum
Slide 26 - Tekstslide
Step 3: duodenum
2 important liquids added in the first part (the duodenum)
Pancreatic juice(contains enzymes: carbohydrases, proteases and lipases)
Bile made by the liver, stored in the gall bladder
--> Bile is alkaline neutralises acid from the stomach --> Bile emulsifies fats, increases surface area of fats, makes it easier for lipase enzymes to act upon
Slide 27 - Tekstslide
Slide 28 - Tekstslide
Bile is made by the:
A
liver
B
gall bladder
C
pancreas
D
duodenum
Slide 29 - Quizvraag
The food molecules in the duodenum are broken down by enzymes in
A
bile
B
pancreatic juice
C
pancreatic juice and bile
Slide 30 - Quizvraag
Is pancreatic juice a digestive juice? And what about bile?
A
Both are digestive juices
B
Only pancreatic juice is a digestive juice
C
Only bile is a digestive juice
Slide 31 - Quizvraag
Step 4: small intestine
Intestinal juice (carbohydrases, proteases, lipases) Complete digestion of food, made by the wall of the small intestine