Cette leçon contient 34 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.
La durée de la leçon est: 50 min
Éléments de cette leçon
Let's repeat 3.3!
Slide 1 - Diapositive
What is the difference between mechanical and chemical digestion?
Slide 2 - Question ouverte
Digestion is
A
Making nutrients smaller
B
Making poop out of food
C
Making food smaller
D
Changing food into something we cannot use
Slide 3 - Quiz
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 4 - Question de remorquage
What is the name of the enzymes in your stomach that break down proteins?
Slide 5 - Question ouverte
What is the end product matching the enzyme called 'protease'?
A
Amino acids
B
Protein
C
Fatty acids
D
Nutrients
Slide 6 - Quiz
Why are there no enzymes that break down water, vitamins and minerals?
Slide 7 - Question ouverte
What is the end product matching the enzyme called 'protease'?
A
Amino acids
B
Protein
C
Fatty acids
D
Nutrients
Slide 8 - Quiz
Which of the following processes does not take place in the small intestine?
A
Ingestion
B
Chemical digestion
C
Mechenical digestion
D
Absorption
Slide 9 - Quiz
Enzymes are ...
A
carbohydrates
B
proteins
C
lipids / fats
D
vitamins / minerals
Slide 10 - Quiz
Which enzyme breaks down fat?
A
amylase
B
lipase
C
fatty acid and glycerol
D
protease
Slide 11 - Quiz
3.4 Organising digestion
Slide 12 - Diapositive
Goals
Goals:
What are the organs and their functions of the digestive system?
What is peristalsis, digestion and emulsification?
Which digestive juices does our body produce and what do they do?
Slide 13 - Diapositive
Slide 14 - Diapositive
Oesophagus and peristalsis
Slide 15 - Diapositive
The stomach
Gastric juices:
Enzymes to break down protein (proteases e.g. pepsin)
Gastric acid:
Destroys bacteria
Mucosal layer inside stomach (why?)
Slide 16 - Diapositive
Acidity and enzymes
Slide 17 - Diapositive
The duodenum
Bile
Pancreatic juice
Slide 18 - Diapositive
Bile and emulsification
Increasing the surface area:
Emulsification
Slide 19 - Diapositive
The small intestine
Intestinal juices
Villi
Hepatic portal vein
Slide 20 - Diapositive
The large intestines and rectum
Absorption of water
Indigestible waste --> faeces
Slide 21 - Diapositive
Slide 22 - Diapositive
Slide 23 - Vidéo
What is peristalsis?
Slide 24 - Question ouverte
salivary glands
pancreas
small intestine
duodenum
large intestine
esophagus
liver
stomach
Slide 25 - Question de remorquage
Which of the following processes does not take place in the small intestine?
A
Ingestion
B
Chemical digestion
C
Mechenical digestion
D
Absorption
Slide 26 - Quiz
1. Bile (gal) contains enzymes. 2. Pancreatic juice contains enzymes.
A
Both are true
B
Both are false
C
Only 1 is true
D
Only 2 is true
Slide 27 - Quiz
muscular motion caused by circular muscles in the digestive tract to transport food
acidic digestive juice made by the stomach to break down proteins and to kill bacteria. It contains water, enzymes and gastric acid.
splitting up fat molecules by adding bile
finger-like structures at the inner lining of the small intestine
peristalsis
gastric juice
emulsification
villi
Slide 28 - Question de remorquage
Fibre is not digested by your body. Ellen and Karim discuss why this is so. Ellen says that fibre is small enough to enter your bloodstream. Karim says that fibre is unused material and it is just eliminated. Who is right?
A
Ellen
B
Karim
C
Both
D
Neither
Slide 29 - Quiz
Which of the following digestive juices kills bacteria in the stomach?
A
Bile
B
Gastric acid
C
Pancreatic juice
D
Gastric juice
Slide 30 - Quiz
Where is bile stored?
Slide 31 - Question ouverte
What is the function of the Liver?
A
To produce saliva
B
To produce bile
C
To produce pancreatic juice
D
Temporary storage of the food
Slide 32 - Quiz
What is NO function of the stomach?
A
Mixing the food
B
Killing germs
C
Adding saliva
D
Digesting proteins
Slide 33 - Quiz
Which enzyme is produced by the salivary glands in the mouth?