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5.9 Neurons
5.9 Neurons
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Slide 1:
Tekstslide
Biologie
Middelbare school
vwo
Leerjaar 1
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5.9 Neurons
Slide 1 - Tekstslide
The Nervous system
The nervous system controls your muscles
-walk / write / exercise
-swallowing / blinking / breathing
-Central nervous system vs.
-Peripheral nervous system
Slide 2 - Tekstslide
The central nervous system (CNS)
Slide 3 - Tekstslide
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
Interneurons are the connections between sensory and motorneurons.(in the spine and the brain)
Slide 4 - Tekstslide
Slide 5 - Tekstslide
Slide 6 - Tekstslide
Slide 7 - Tekstslide
The message
-Nerve impulses (electrical signals)
-Via the axon of the nerve cell
-
Fatty sheat
around axons make the impuls travel faster
Slide 8 - Tekstslide
Dendrite
Cell body
Nucleus
Axon
Fatty sheath
Synapse
Slide 9 - Sleepvraag
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 10 - Quizvraag
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 11 - Quizvraag
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 12 - Quizvraag
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 13 - Quizvraag
Sensory neurons carry information
A
away from the brain.
B
both to and from the brain.
C
towards the brain.
D
within the brain
Slide 14 - Quizvraag
True
False
Motor (efferent) neurons carry messages to the central nervous system.
The nucleus of a neuron is found outside the cell body (soma)
Slide 15 - Sleepvraag
Motor Neuron
Relay neuron
Sensory neuron
Found in visual system, brain, and spinal cord, pass informatiion on
carry electrical impulses away from the brain and spinal cord
Take information from sense organs to the brain and spinal cord
Slide 16 - Sleepvraag
homework
tuesday: study page 136/137 (5.9)
do excercises 45 till 50, write down difficult words!
friday: study 5.9 completely
do excercises 51 till 56
Slide 17 - Tekstslide
questions?
about page 136, 137
difficult words?
the workbook?
Slide 18 - Tekstslide
Dendrite
Cell body
Nucleus
Axon
Fatty sheath
Synapse
Slide 19 - Sleepvraag
nerves
Slide 20 - Tekstslide
spinal cord - grey and white matter
Slide 21 - Tekstslide
Reflex arcs
You take away your hand from an hot object very fast
Automatically, why?
Reflexes protect you
Why do you think a reflex is unconscious?
Signal does not go to the brain immediately
It goes to the spinal cord and back (short circuit)
Slide 22 - Tekstslide
Reflex arcs
W
Stimulus?
Receptor?
Effector?
Response?
Slide 23 - Tekstslide
Reflex arcs
Stimulus = hot flame
Receptor = heat sensor in the skin
Effector = muscles in your arm
Response = moving your hand away from the hot object.
Slide 24 - Tekstslide
Reflex or not???
Reflex
Reflex
concious
trained reflex
Slide 25 - Sleepvraag
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