LESSON 6

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

Have ready:

• straight rows & backs to me
• only lessonup (check code)
• maximum brightness (F2) and maximum sound (F12)
• Check force quit under the 🍏 logo (top left)

TV2B

HAVE READY:

- GOOGLE CLASSROOM

- YOUR HOMEWORK

- KERBOODLE PAGE 58

- YOUR HW

LESSON 6

HW FOR TODAY:

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.

MOUTH

STOMACH

LIVER

OESOPHAGUS

DUODENUM

SMALL INTESTINE

LARGE INTESTINE

PANCREAS

CHEMICAL DIGESTION:

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

KERBOODLE PAGE 54

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.

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.

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

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.

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

Chemical digeston step 3: part B

• the place: the duodenum
• the enzyme: amylase
• the liquid: chyme 
• the nutrient:carbohydrates and maltose
• the products: glucose

Chemical digeston step 3: part C

• the place: the duodenum
• the enzyme: protease
• the liquid: chyme 
• the nutrient:proteins
• the products: amino acids

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)