Biology

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Whats a Stimulus?
It's a change in your environment that you may need to react to
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What are Receptors
they are groups of cells which are sensitive to a stimulus
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What do receptors do?
They change stimulus energy(e.g light energy) into electrical impulses
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What are sensory Neurones?
The nerve cells that carry signals as electrical impulses from the receptors to the central nervous system
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What are motor Neurones?
The nerve cells that carry signals to the effector muscles or glands
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What are effectors?
muscles and glands(they respond in different ways).Muscles contract in response to a nervous impulse whereas glands secrete hormones
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where is all the information from the sense organ sent?
The central nervous system
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What does the central nervous system consist of?
the brain and spinal cord.
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Whats the passage of information in a reflex called?
Reflex arc
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what happens when a stimulus is detected?
An impulse is sent along a sensory neurone to the spinal cord. The spinal cord then passes on a message to the relay neurone,the impulses is sent to a motor neurone this then travels to the effector,the effector then reacts.
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Whats the connection between two neurones called?
Synapse
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Other cards in this set

Card 2

Front

What are Receptors

Back

they are groups of cells which are sensitive to a stimulus

Card 3

Front

What do receptors do?

Back

Preview of the front of card 3

Card 4

Front

What are sensory Neurones?

Back

Preview of the front of card 4

Card 5

Front

What are motor Neurones?

Back

Preview of the front of card 5
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