7.4 Digesting food (enzymes)

• Biologie
• Middelbare school
• havo
• Leerjaar 2

7.4 Digesting food

Learning objectives

You will learn how food is digested and which organs are involved in the digestion process.

Why is your stool (poep) brown?

1. Because you eat brown bread.
2. Because it contains brown bacteria.
3. Because it contains substances from discardes blood cells.
4. Because food spoils inside your digestive system.

Energy-rich substances

Building compounds

Protective substances

carbohydrates

proteins

fats

minerals

vitamins

water

Digestion (Vertering)

Breaking down nutrients into smaller pieces so they can be absorbed by the blood. 

Enzymes

They 'cut'the large chunks of nutrients into pieces. 

Dutch

English

Peristalsis = the muscle movement in the wall of the digestive organs that push the food bolus forward and mix it. 

What is the function of enzymes

1. To ensure rapid digestion takes place
2. To break the food up into small pieces

Food is pushed into your stomach by

1. muscular contractions called peristalsis
2. digestive juices
3. voluntary control
4. gravity

What is NO function of the stomach?

1. Mixing the food
2. Killing germs
3. Adding saliva
4. Digesting proteins

The environment of the stomach is

1. Acidic
2. Alkaline
3. Neutral

The digestion of starch starts in the ...

1. Mouth
2. Stomach
3. Duodenum
4. Small intestine

Where are most nutrients from your food taken up into the blood?

1. Mouth
2. Stomach
3. Small intestine
4. Large intestine

Wat?	Maken: 7.4 opdr. 3 t/m 5, 7, 8, 15, 20, 21, 23 t/m 25
Hoe?	In je (online) boek. Werkbladopdrachten maak je in je schrift. Fluisterend overleggen of muziek luisteren.
Hulp?	Steek je hand op. Als je geen muziek luistert mag je ook overleggen met je buurman/buurvrouw.
Tijd?	15 minuten
Klaar?	Finish 7.1, 7.2 and 7.3
Opbrengst	Als je klaar bent heb je je huiswerk af! Nu weet je meer over de stof.