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Lesson 1: The nervous system
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Biologie
Middelbare school
vwo
Leerjaar 2
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Slide 1 - Diapositive
Brain and Senses
Lesson 1: Neurons and the brain
Chapter 8: Kerboodle: 'Control and coordination'
-Page 108 t/m 111
Slide 2 - Diapositive
How do you detect and respond to changes?
Nervous system: electrical messages
Hormonal system: chemical messages
Slide 3 - Diapositive
Getting a reaction
-
Stimuli
(a change that can be detected)
-
Receptors
(detect changes)
-
Effectors
(bring about a response)
Slide 4 - Diapositive
An example
Throwing a pen towards someone
Stimuli
--> the pen coming towards you
Receptors
--> retina of your eye 'seeing' the pen
Effectors
--> muscles in your arm to catch the pen
Slide 5 - Diapositive
The Nervous system
The nervous system controls your muscles
-walk / write / exercise
-swallowing / blinking / breathing
-Central nervous system vs.
-Peripheral nervous system
Slide 6 - Diapositive
The central nervous system (CNS)
Slide 7 - Diapositive
Nerve cells / neurons
Sense organs (receptors) send messages to the CNS
via
Sensory neurons
Muscles and glands (effectors) CNS send messages telling them wat to do
via
Motor neurons
Slide 8 - Diapositive
Slide 9 - Diapositive
The message
-Nerve impulses (electrical signals)
-Via the axon of the nerve cell
-
Fatty sheat
around axons make the impuls travel faster
-Multiple slerosis (MS) the fatty sheat breaks down they lose their use of the muscles
Slide 10 - Diapositive
Slide 11 - Diapositive
You get an itch in your elbow. What is the stimulus in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow
Slide 12 - Quiz
You get an itch in your elbow. What is the response in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow
Slide 13 - Quiz
You get an itch in your elbow. What is the coordinator in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow
Slide 14 - Quiz
You get an itch in your elbow. What is the receptor in this reaction?
A
Receptors in your skin
B
The itch itself
C
muscles that move your arm to scratch
D
The brain that decides to scratch the elbow
Slide 15 - Quiz
Which will send a message along sensory neurons?
A
Receptors in your skin
B
The spinal cord
C
The muscles in your arm
D
The brain
Slide 16 - Quiz
Which will receive a message by motor neurons?
A
Receptors in your skin
B
The spinal cord
C
The muscles in your arm
D
The brain
Slide 17 - Quiz
HW for next lesson
Hw for lesson 3:
Complete the worksheet on classroom
Slide 18 - Diapositive
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