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6.1 Responding to your surroundings
CHAPTER 6
Senses, coordination and behaviour
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Biologie
Middelbare school
vwo
Leerjaar 1
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Lesson duration is:
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CHAPTER 6
Senses, coordination and behaviour
Slide 1 - Slide
Today
6.1 Responding to your surroundings
Explaination and assignments LessonUp
Assignment 2 + 3 + 4
Slide 2 - Slide
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 - Slide
Senses
Slide 4 - Mind map
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 - Slide
Sense organs = zintuigen
Eyes, ears, nose, tongue, skin
Together =
sensory system
Slide 6 - Slide
Sensory organs
Slide 7 - Slide
All your senses together form the ...
A
nervous system
B
sensory system
C
brain system
D
sense canal
Slide 8 - Quiz
Sense organs send signals through the nerves to the ...
A
eyes
B
ears
C
brain
D
muscles
Slide 9 - Quiz
How do you call the signals the sense organs send out?
Slide 10 - Open question
Sense receptors in the skin
Heat receptors
Cold receptors
Pressure receptors
Touch receptors
Slide 11 - Slide
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
Slide 12 - Slide
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 - Slide
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 - Slide
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 15 - Slide
Match the correct adequate stimulus to the sensory organ
Sound
Taste
Light
Smell
Slide 16 - Drag question
Non-adequate stimuli
Sometimes sensory organs will response to other stimuli
When you got hit in your eyes, you will see "stars"
But, the threshold value is higher than for the adequate stimulus
Slide 17 - Slide
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 18 - Slide
What do we call the lowest intensity that can cause an impuls?
A
Adequate stimulus
B
Threshold value
C
impulse
D
habituation
Slide 19 - Quiz
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 20 - Quiz
Nervous system
Central nervous system
- Brain
- Spinal cord
Nerves
Slide 21 - Slide
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 22 - Open question
Let's get to work
Read 6.1 in your (online) textbook
Make assignments 2, 3 and 4 in your (online) workbook
Slide 23 - Slide
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