2t Bricks digestion 3.3 + 3.4

Digestion
Bricks 3.3 + 3.4
1 / 36
next
Slide 1: Slide
BiologieMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 36 slides, with interactive quizzes, text slides and 1 video.

time-iconLesson duration is: 30 min

Items in this lesson

Digestion
Bricks 3.3 + 3.4

Slide 1 - Slide

Digestion
Digestion: Breakdown of food molecules into small food molecules 

When food is digested it is absorbed  

Slide 2 - Slide

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 - Slide

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

Slide 4 - Drag question

FASES OF DIGESTION:
  • INGESTION
  • CHEMICAL AND MECHANICAL DIGESTION
  • ABSORPTION
  • ELIMINATION

Slide 5 - Slide

Slide 6 - Slide

Slide 7 - Slide

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 - Drag question

CHEMICAL DIGESTION:
  • BREAKING THE FOOD INTO EVEN SMALLER MOLECULES.
  • USING ENZYMES TO BREAK DOWN THE FOOD MOLECULES. 

Slide 9 - Slide

3.4 organising digestion
- the organs and their function in the digestive system
- peristalsis, digestion, emulsification
- digestive juices and their function

Slide 10 - Slide

Chemical digestion
Enzymes: Important chemicals

Slide 11 - Slide

Slide 12 - Slide

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 - Slide

Down the tube!
Oesophagus
Peristalsis: moving food down your oesaphagus (gullet)

Slide 14 - Slide

Why is your stomach rumbling? 
-peristalsis, muscle activity
- mechanical digestion

-Empty stomach and intestines make a louder sound!

Slide 15 - Slide

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 - Slide

duodenum
salivary gland
liver
pancreas
gall bladder
small intestine
large intestine
stomach
oesophagus
rectum
appendix
pancreatic duct
anus

Slide 17 - Drag question

Amylase is an example of a
A
Carbohydrase
B
Lipase
C
Protease

Slide 18 - Quiz

After breaking down of proteins you get:
A
glucose
B
amino acids
C
fatty acids
D
glycerol

Slide 19 - Quiz

The environment of the stomach is
A
Acidic
B
Alkaline
C
Neutral

Slide 20 - Quiz

After breaking down fats you get:

Slide 21 - Open question

3.4
practice makes perfect

Slide 22 - Slide

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 - Slide

Slide 24 - Slide

inactive enzyme pepsinogen
active enzyme pepsin

Slide 25 - Slide

Step 3: duodenum

Slide 26 - Slide

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 - Slide

Slide 28 - Slide

Bile is made by the:
A
liver
B
gall bladder
C
pancreas
D
duodenum

Slide 29 - Quiz

The food molecules in the duodenum are broken down by enzymes in
A
bile
B
pancreatic juice
C
pancreatic juice and bile

Slide 30 - Quiz

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 - Quiz

Step 4: small intestine


Intestinal juice (carbohydrases, proteases, lipases) Complete digestion of food, made by the wall of the small intestine

Slide 32 - Slide

Slide 33 - Video

STEP 1:
MOUTH
STEP 2:
STOMACH
STEP 3:
DUODENUM

Slide 34 - Slide

Slide 35 - Slide

Slide 36 - Slide