biology- synapse and reflexes

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  • Created by: fia21
  • Created on: 11-04-14 17:34
define: synapse
the gap between 2 neurons
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how is the nerve signal transferred?
through chemicals which defuse along the gap
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define: reflex
an automatic response to a certain stimuli
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give an example of a reflex
when light is shone into your eye your pupils go big to let less light in
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describe the 1st stage of the nervous system
the stimulus is detected by a receptor, impulses are sent along a a sensory neurone
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2nd stage of the nervous system
impulses reach a synapse between the sensory and relay neurone, they trigger chemicals to be sent across, causing impulses to be sent along the relay neurone
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3rd stage
when the relay reaches a synapse between the relay and motor neurone chemicals are passed along again
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4th stage
the impulses travel to the effector
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5th
the muscle contracts to move away from the stimulus
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Other cards in this set

Card 2

Front

how is the nerve signal transferred?

Back

through chemicals which defuse along the gap

Card 3

Front

define: reflex

Back

Preview of the front of card 3

Card 4

Front

give an example of a reflex

Back

Preview of the front of card 4

Card 5

Front

describe the 1st stage of the nervous system

Back

Preview of the front of card 5
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