5 - Digestive enzymes

LESSON 5
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Slide 1: Tekstslide
BiologieMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 37 slides, met interactieve quizzen, tekstslides en 2 videos.

time-iconLesduur is: 45 min

Onderdelen in deze les

LESSON 5

Slide 1 - Tekstslide

Review lesson 1:
  • Nutrients 
  • Sources and Uses 

Slide 2 - Tekstslide

What is sodium an example of?
A
carbohydrates
B
water
C
minerals
D
vitamins

Slide 3 - Quizvraag

What are peaches a good source of?
A
carbohydrates
B
water
C
fibres
D
proteins

Slide 4 - Quizvraag

What are raw nuts a good source of?
A
carbohydrates
B
water
C
fibres
D
proteins

Slide 5 - Quizvraag

Review lesson 2:
  • balanced diets
  • dietary choices
  • psychological issues with food

Slide 6 - Tekstslide

Someone who is a ovotarian does not eat ..... and does eat .........?
A
vegetables, cheese
B
meat, eggs
C
meat, fish
D
vegetables, fish

Slide 7 - Quizvraag

Explain the difference between a vegetarian and a pescatarian.

Slide 8 - Open vraag

Which religion does not allow any alcohol and any pork products?
A
Islam
B
Buddhism
C
Judeism
D
Christianity

Slide 9 - Quizvraag

Review lesson 3:

  • Deficiencies
  • Diabetes
  • Unhealthy lifestyles

Slide 10 - Tekstslide

What deficiency is caused by a lack of iron?
A
scurvy
B
rickets
C
anemia
D
marasmus

Slide 11 - Quizvraag

What deficiency is caused by a lack of vitamin C?
A
scurvy
B
rickets
C
anemia
D
marasmus

Slide 12 - Quizvraag

What deficiency is caused by a lack of vitamin D & calcium?
A
scurvy
B
rickets
C
anemia
D
marasmus

Slide 13 - Quizvraag

Which type of diabetes is preventable?
A
type 1
B
type 2

Slide 14 - Quizvraag

Review lesson 4:
  • How does our body process the food?
  • Fases of digestion
  • Teeth

Slide 15 - Tekstslide

What does ingestion mean?
A
moving the food into your body
B
biting and chewing food

Slide 16 - Quizvraag

MOUTH
STOMACH
LIVER
OESOPHAGUS
DUODENUM
SMALL INTESTINE
LARGE INTESTINE
PANCREAS

Slide 17 - Sleepvraag

crown
root
dentine
pulp
jaw bone
gums
enamel
nerves & bloodvessels

Slide 18 - Sleepvraag

HW FOR TODAY:
  1. HW  for lessons 2-5 should be completed and handed in.
  2. Did you check you did it to the correct  level?
  3. Answer sheets are uploaded on the stream.
  4. Any questions until now?

Slide 19 - Tekstslide

LESSON 5

Slide 20 - Tekstslide

TODAY:
  • Chemical digestion (mouth)
  • Chemical digestion (stomach)
  • Chemical digestion (duodenum)
  • Absorption (villi)

Slide 21 - Tekstslide

INGESTION:
MOVING THE FOOD INTO YOUR MOUTH

Slide 22 - Tekstslide

MECHANICAL DIGESTION:

  • BREAKING THE FOOD INTO SMALLER PIECES.
  • THIS IS DONE BY YOUR TEETH
  • BITING AND CHEWING

Slide 23 - Tekstslide

Slide 24 - Video

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

Slide 25 - Tekstslide

KERBOODLE PAGE 54

Slide 26 - Tekstslide

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

Slide 27 - Tekstslide

Chemical digestion step 1: 
  • the place: the mouth (esophagus)
  • the enzyme: amylase
  • the liquid: saliva
  • the nutrient: carbodrates
  • the products: glucose & maltose

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

Slide 28 - Tekstslide

Chemical digestion 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 29 - Tekstslide

Extra info about the stomach: 
  • the place: the stomach
  • the enzyme: rennin
  • the liquid: chyme
  • the nutrient: milk
  • the products:turns the proteins in milk solid and lump together so it is easier to digest

Slide 30 - Tekstslide

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

  • Bile is an alkaline and neutralises the acid in the chyme. (drops the pH).
  • Bile emulsifies (breaks chemical bonds) fats. Splits it into smaller drops

Slide 31 - Tekstslide

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 32 - Tekstslide

Chemical digestion step 3: part B
  • the place: the duodenum
  • the enzyme: amylase
  • the liquid: chyme 
  • the nutrient:carbohydrates and maltose
  • the products: glucose

Slide 33 - Tekstslide

Chemical digestion step 3: part C
  • the place: the duodenum
  • the enzyme: protease
  • the liquid: chyme 
  • the nutrient:proteins
  • the products: amino acids

Slide 34 - Tekstslide

Slide 35 - Video

Slide 36 - Tekstslide

Homework: 
  • Complete the hw on classroom to your correct level.
  • Study the Quizlet of "Glossary Food & Digestion" (100% on learn, match, flashcards &  test) 

Slide 37 - Tekstslide