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6.1 Responding to your surroundings
CHAPTER 6
Senses, coordination and behaviour
!Glossary
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Biologie
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CHAPTER 6
Senses, coordination and behaviour
!Glossary
Slide 1 - Tekstslide
Today
6.1 Responding to your surroundings
Explaination and assignments LessonUp
Assignment 2 + 3 + 4
Slide 2 - Tekstslide
After this lesson you'll know
What a sense organ is and where to find them in your body
How sense organs work
The meanings of the keywords: stimulus, impulse, threshold value
Slide 3 - Tekstslide
Senses
Slide 4 - Woordweb
Sensing things
You see and smell chocolate
Using
sense organs
Signal
(impulse)
through
nerves
to your
brain
Brain send impulse to arm muscle -> you grab the chocolate
Slide 5 - Tekstslide
Sense organs = zintuigen
Eyes, ears, nose, tongue, skin
Together =
sensory system
!Glossary
Slide 6 - Tekstslide
Sensory organs
Slide 7 - Tekstslide
All your senses together form the ...
A
nervous system
B
sensory system
C
brain system
D
sense canal
Slide 8 - Quizvraag
Sense organs send signals through the nerves to the ...
A
eyes
B
ears
C
brain
D
muscles
Slide 9 - Quizvraag
How do you call the signals the sense organs send out?
Slide 10 - Open vraag
Sense receptors in the skin
Heat receptors
Cold receptors
Pressure receptors
Touch receptors
!Glossary
Slide 11 - Tekstslide
Reacting to the surrounding
Stimulus
(prikkel) = information from the surrounding
Light, temperature, smell, sounds, skin contact
Stimulus
-> sense organ ->
impulse
-> nerves -> brain
Brain responds with a impulse to the muscles to react
!Glossary
Slide 12 - Tekstslide
Sensory cells
Sensory organs have
sensory cells
Which are connected to
nerves
When the senory cells recieve a
stimulus
they generate an
impulse
(kind of
electrical signal
)
Slide 13 - 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 impulsesthe lowest intensity of stimulus that causes an impulse
Slide 14 - 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
!Glossary
Slide 15 - Tekstslide
Match the correct adequate stimulus to the sensory organ
Sound
Taste
Light
Smell
Slide 16 - Sleepvraag
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
!Glossary
Slide 17 - Tekstslide
What do we call the lowest intensity that can cause an impuls?
A
Adequate stimulus
B
Threshold value
C
impulse
D
habituation
Slide 18 - Quizvraag
If a stimulus does not go away for some time, it starts producing less impulses in the cell. What do we call this?
A
Adequate stimulus
B
Threshold value
C
impulse
D
habituation
Slide 19 - Quizvraag
Nervous system
Central nervous system
- Brain
- Spinal cord
Nerves
Slide 20 - Tekstslide
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 21 - Open vraag
Let's get to work
Read 6.1 in your (online) textbook
Make assignments 1, 2, 3 and 4 in your (online) workbook
Homework:
* Finish the assignments
* Complete your BS 1 glossary (write down what the words mean)
Slide 22 - Tekstslide
!Glossary
Senses
Sensory organs
Sensory system
Nervous system
Receptor
Stimulus
Impulse
Adequate stimuli
Habituation
Slide 23 - Tekstslide
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