Combustion and respiration

• Biologie
• Middelbare school
• havo
• Leerjaar 2

Welcome!

Today: 

Discussing homework, page 9

Questions about photosynthesis

Discussing respiration and combustion (Book page 13)

Work on exercises 

Demo in het lab 

What isn't released during photosynthesis?

1. Zuurstof
2. Glucose
3. Koolstofdioxide

A plant needs oxygen for photosynthesis.

1. True
2. False

Why is it important that there are so many plants on the earth? Multiple answers correct.

What are we learning today?

Today we will be learning:

Why your body needs to respirate.

What you need for respiration/combustion.

What is released during respiration/combustion. 

Respiraton and combustion

Combustion means burning something and releasing energy. For combustion to take place, it needs fuel, oxygen and energy. Combustion also takes place in our body, where it is called respiration. 

Why respirate?

Your body consist of a lot of cells, which all need energy to live. It will get this energy in the form of food, where energy is stored. This food will respirate in the mitchondria, and energy is released. Cells that need a lot of energy have a lot of mitochondria, and vice versa. 

Why respirate?

This primary type of fuel for your cells is glucose. Glucose is the building block for all sugars and carbonhydrates (koolhydraten). 

What are the types of foods that have a lot of carbonhydrated? 

Respiration 

When you are very active you need a lot of energy, when you are not that active you don't need as much. 

Your body always needs a minimum amount of energy for necesarry processes. 

What is released during respiration?

Just like with any other metabolic processes, waste product are also made during respiration: carbondioxide and water. 

Which organisms use these two waste products?

Homework

Start working on the exercises of paragraph 1.2, this is homework for the next lesson. 

What must our body respirate?

Which organisms respirate?

1. Animal
2. Animals and bacteria
3. Animals, fungi and bacteria
4. Animals, fungi, plants and bacteria

Which organelles do plants have?

1. Mitochondria
2. Chloroplasts
3. Both
4. None

What is the chemical reaction of combustion?