Lesson 1: Respiration and testing

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Program

Welcome to Biology

Introduction

Lessonup

Unit 1 Basic 1-3

Do's during instruction

Always have: your textbook, workbook and pencil case with you

Take notes: Taking notes is learning 

Make drawings and sketches: 

*During learning it clarifies and visualises the subject 

Make a glossary

list difficult/biological words, use a dictionary

Breathing and respiration

Lesson 1: Combustion and respiration 

Some questions: 

• What do you need for combustion (burning)?
• What is produced by combustion?
• What are the starting substances in our body for combustion?
• What do we do with the products? 
  

What is the formula of respiration (= combustion in your body)? 

->

Glucose

Oxygen

Energy

Carbon dioxide

Water

Combustion in your body = respiration

Getting energy from food 

• Our fuel is glucose
  
• Oxygen is needed to break down glucose (breathing)
  

Because oxygen is needed we call it:

Aerobic respiration 

Energy in our body is used for?

Using energy

-contraction of muscles

-Transporting chemicals

-Absorbing food

-Sending messages along nerves

-Building new cells for growth

-Keeping a constant body temperature

Where in our body is energy produced? 

I’m a real “powerhouse” 

That’s plain to see

I break down food

And release energy 

Where is the energy produced?

Carbon dioxide 

• Waste gas made in respiration
  
• becomes toxic if it builds up in cells
  
• we need to get rid of it....
  

Testing for carbon dioxide

• Lime water goes cloudy when CO2 is added
  

Cold- and warm-blooded

cold-blooded: the body temperature is roughly the same as the temperature of the surroundings -> little respiration in cold areas -> little energy

warm-blooded: body temperature is constant (always the same) -> enough respiration -> high energy

Which statement(s) are true about cold-blooded animals

1. temperature is always 37 degrees
2. reptiles, insects, birds
3. hibernation=winterslaap
4. migration

How do we call combustion in your body?

Carbon dioxide is released through breathing

1. true
2. false

You can indicate oxygen with lime water

1. true
2. false

Why can't we hold our breath for long?

Video: https://www.schooltv.nl/video/proefkonijnen-in-de-klas-hoelang-kun-je-je-adem-inhouden-onder-water/