Responding to Change

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The nervous system enables humans to....
react to their surroundings and coordinate their behaviour.
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Information from ____ passes along the cells, called neurons, in nerves to the brain.
Receptors
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What are nerve impulses?
Electrical Signals that travel along neurons, at very high speeds.
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What are receptors?
They detect stimuli which include light, sound, changes in position, chemicals, touch, pressure, pain and temperature.
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What are sensory neurons?
They transmit nerve impulses from the receptors to the CNS when a stimulus is detected.
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What are motor neurons?
They transmit nerve impulses from the CNS to the effectors, to bring about a response.
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What are effectors?
These are muscles or glands.
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What are the two areas if the nervous system?
The Central Nervous System (CNS) and the Peripheral Nervous System (PNS)
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What is the Central Nervous System?
The brain and the spinal chord - this coordinates the response.
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What is the Peripheral Nervous System?
This consists of nerves connecting the CNS to the rest of the body, e.g. the optic nerve and sciatic nerve.
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What are nerves?
Bundles of motor and sensory neurones.
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Other cards in this set

Card 2

Front

Information from ____ passes along the cells, called neurons, in nerves to the brain.

Back

Receptors

Card 3

Front

What are nerve impulses?

Back

Preview of the front of card 3

Card 4

Front

What are receptors?

Back

Preview of the front of card 4

Card 5

Front

What are sensory neurons?

Back

Preview of the front of card 5
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