The Nervous System

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The five different sense organs are
eyes, ears, nose, tongue, skin
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They all contain
different receptors
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Receptors are
a group of cells which are sensitive to a stimulas
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Receptors change stimulus energy to
electrical impulses
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The central nervous system coordinates
a response
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The CNS is where all the information from the sense organ is sent and
where relflexes and actions are coordinators
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The CNS consists of ... only
the brain and spinal chord
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Neurones are
nerve cells
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Neurones transmit the information as
electrical impulses quickly to and from the CNS
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Instructions from the CNS are sent to the effectors (muscles and glands) which
respond accordingly
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Effectors are
muscles and glands
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Muscles contract in response to a
nervous impulse whereas glands secrete hormones
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Sensory Neurones: Nerve cells that carry signals from receptors to the
central nervous system
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Relay neurones: Carry signals from sensory neurones to
motor neurones
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Motor neurones: Nerve cells carry signals from the CNS to
the effector muscles or glands
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Other cards in this set

Card 2

Front

They all contain

Back

different receptors

Card 3

Front

Receptors are

Back

Preview of the front of card 3

Card 4

Front

Receptors change stimulus energy to

Back

Preview of the front of card 4

Card 5

Front

The central nervous system coordinates

Back

Preview of the front of card 5
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