SME
Grade 9 Science · Biology
The nervous system and the senses
Put the steps of a reflex in order, from the receptor in the skin to the muscle that moves.
Put in order
Put the steps of a reflex in order: a hand touches a hot pan.
1
?
2
?
3
?
4
?
5
?
6
?
Assumptions
•
A neuron receives signals on its dendrites and sends an impulse along its axon to the next cell.
•
In a reflex the spinal cord answers before the brain knows: that saves time.
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A nerve impulse
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Which part of the nervous system?
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Which receptor detects it?
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