5.1 - Percieving your environment

Unit 5 Perception, behaviour and regulation

Grab your notebook and a pen
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Slide 1: Tekstslide
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In deze les zitten 29 slides, met interactieve quizzen, tekstslides en 1 video.

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Unit 5 Perception, behaviour and regulation

Grab your notebook and a pen

Slide 1 - Tekstslide

Today's lesson
- Introduction to your senses - the English version
- Which organs are we talking about?
- How do impulses start?
- How does your nervous system function?

Slide 2 - Tekstslide

You can sense things around you. What can you sense around you? List 5 of your senses.

Slide 3 - Open vraag

Sensing things
You see and smell chocolate
Using sense organs
Signal (impulse) through nerves to your brain
Brain sends impulse to arm muscle -> you grab the chocolate

Slide 4 - Tekstslide

Sense organs = zintuigen
Eyes, ears, nose, tongue, skin

Together = sensory system

Slide 5 - Tekstslide

Reacting to the surrounding
Stimulus (prikkel) = information from the surrounding (=omgeving)
For example: light, temperature, smell, sounds, skin contact

Route of reacting to the surrounding:
Stimulus -> sense organ -> impulse -> nerves -> brain 
Brain responds with a impulse to the muscles to react 

Slide 6 - Tekstslide

Sensing things

Slide 7 - Tekstslide

Video assignment
1. Grab you notebook and a pen
2. Write down every sense you see in the video
3. What is the stimulus?

Slide 8 - Tekstslide

Slide 9 - Video

Sensory organs

Slide 10 - Tekstslide

Sense receptors in the skin

Heat receptors
Cold receptors
Pressure receptors 
Touch receptors

Slide 11 - Tekstslide

Sense organs send signals through the nerves to the ...

Slide 12 - Quizvraag

All your senses together form the ...
nervous system
sensory system
brain system
sense canal

Slide 13 - Quizvraag

How do you call the signals the sense organs send out?

Slide 14 - Open vraag

Get to work
BS 5.1 
Make assignment 5 to 10
Do you have difficulties with the assignments? 
Make 1 to 3 + 7 + 9

Read BS 5.4 The nervous system
Arceer moeilijke woorden

Slide 15 - Tekstslide

Slide 16 - Tekstslide

Nervous system
Central nervous system
- Brain
- Spinal cord


Slide 17 - Tekstslide

Which square is darker?

Slide 18 - Tekstslide

Which square is darker?

Slide 19 - Tekstslide

Sensory cells
Sensory organs have sensory cells
Which are connected to nerves

When the sensory cells receive a stimulus they generate an impulse (kind of electrical signal)

Slide 20 - Tekstslide

How an impulse starts
Stimulus needs to be strong enough -> threshold value
= the lowest intensity of stimulus that causes an impulse

Example: a sound needs to be hard enough to hear 
-> Soft sounds don't cause impulses the lowest intensity of stimulus that causes an impulse

Slide 21 - Tekstslide

Adequate stimuli
A stimulus that sensory cells are particularly sensitive for 

Sensory cells in your eyes respond to light
Light is the adequate stimulus

Slide 22 - Tekstslide

Match the correct adequate stimulus to the sensory organ

Slide 23 - Sleepvraag

Non-adequate stimuli
Sometimes sensory organs will response to other stimuli
When you get hit in your eyes, you will see "stars"
But, the threshold value is higher than for the adequate stimulus

Slide 24 - Tekstslide

Habituation = gewenning

If a stimulus doesn't go away for a long time, your sensory cells will produce less impulses

You don't really feel your clothes on your body because of habituation

Slide 25 - Tekstslide

What do we call the lowest intensity that can cause an impulse?
Adequate stimulus
Threshold value

Slide 26 - Quizvraag

If a stimulus does not go away for some time, it starts producing less impulses in the cell. What do we call this?
Adequate stimulus
Threshold value

Slide 27 - Quizvraag

Fill in the right words:
The smell of a fresh panini comes into your nose, this is called a .... Then a .... is sent through the nerves to the brain.

Slide 28 - Open vraag

Let's get to work
Read 6.1 in your (online) textbook
Make assignments 2, 3 and 4 in your (online) workbook

Slide 29 - Tekstslide