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LESSON 5

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Slide 1: Tekstslide
BiologieMiddelbare schoolhavo, vwo

In deze les zitten 29 slides, met interactieve quiz, tekstslides en 2 videos.

time-iconLesduur is: 45 min

Onderdelen in deze les

Have ready:
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Slide 1 - Tekstslide

HAVE READY:
- GOOGLE CLASSROOM
- YOUR HOMEWORK
- KERBOODLE PAGE 54
- YOUR HW

Slide 2 - Tekstslide

LESSON 5

Slide 3 - Tekstslide

HW FOR TODAY:
Worksheets teeth

Slide 4 - Tekstslide

Worksheet teeth exercise 1:

Slide 5 - Tekstslide

Worksheet teeth exercise  2:
  • a. the teeth are cearly different because the animals have different diets.
  • b. the carnivore's teeth are adaped to hunting. They can be used for gripping and ripping and because of this they chew very little.
  • c. the herbivore's teeth are adapted to grazing, they no longer have/need canines.They have incisors specialised for cutting graas and many molars for grinding dow difficut to digest plants.

Slide 6 - Tekstslide

Worksheet teeth and flouride left side:

Slide 7 - Tekstslide

Worksheet teeth and flouride right side:
  • a) 4,5 teeth b) 3,5 teeth
  • 2. this shows that the average number of decayed teeth per person goes does when the fluoride concentration in the water supply goes up.
  • opinions ??

Slide 8 - Tekstslide

Worksheet teeth and decay:
  1. What is the function of the molars and premolars in our digestion?
  2. What is plaque?
  3. Why do you think large cavities are painful?
  4. Why do you think dentists tell us not to eat too many sugary foods?
  5. Explain why: a) most toothpastes contain fluoride? b) most toothpastes are weak alkalis?
  6. Find out what a ‚Äėwisdom tooth‚Äô is. Do all adults have wisdom teeth?

Slide 9 - Tekstslide

FASES OF DIGESTION:
  • INGESTION
  • MECHANICAL DIGESTION
  • CHEMICAL DIGESTION
  • ABSORPTION
  • EGESTION
  • DEFAECATION

Slide 10 - Tekstslide

INGESTION:
MOVING THE FOOD INTO YOUR MOUTH

Slide 11 - Tekstslide

MECHANICAL DIGESTION:

BREAKING YOUR FOOD INTO SMALLER PIECES USIG YOUR TEETH.

Slide 12 - Tekstslide

MOUTH
STOMACH
LIVER
OESOPHAGUS
DUODENUM
SMALL INTESTINE
LARGE INTESTINE
PANCREAS

Slide 13 - Sleepvraag

Slide 14 - Tekstslide

Slide 15 - Video

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

Slide 16 - Tekstslide

KERBOODLE PAGE 54

Slide 17 - Tekstslide

Chemical digeston 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 18 - Tekstslide

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 19 - 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 20 - Tekstslide

Slide 21 - Tekstslide

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 22 - 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 23 - Tekstslide

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

Slide 24 - Tekstslide

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

Slide 25 - Tekstslide

CHARACTERISTICS OF THE VILLUS:

- LARGE SURFACE AREA (MORE CONTACT MORE ABSORPTION)
- ONE CELL LAYER THICK (THIN WALLS FASTER ABSORPTION)
- GOOD BLOOD SUPPLY (FAST TRANSPORT OF NUTRIENTS TO THE REST OF THE BODY)

Slide 26 - Tekstslide

Slide 27 - Video

Slide 28 - Tekstslide

HW FOR LESSON 6: Enzymes & Absorption

  • Study for the glossary quiz
  • Organise your notes from lesson 5
  • Organise the information in your mindmap and upload a screenshot.
  • Answer the questions on the worksheet about Renin
  • Complete the question on tb pages 60-61.

Slide 29 - Tekstslide