The Nervous System

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Simple Reflex Arc
A rapid, innate, automatic and protective response to a stimuli
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Sensory Neurone
carries impulses from the receptor
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Intermediate Neurone
Links the sensory neurone to the motor neurone
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Motor Neurone
Carries the impulse to the effector, which is usually muscle
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Why are reflex actions fast?
Because the neurone pathway is short - only 3 neurones
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Why are reflex actions important?
They protect the body from harmful stimuli. They are also involuntary and do not have to be learned as they are effective from birth.
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Sensory Nervous System
Carries impulses from the receptor the the Central Nervous System(CNS).
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Motor Nervous System
Carries impulses from the CNS to the effector.
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Voluntary Nervous System
Carries impulses to muscles under our voluntary control.
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Autonomic Nervous System
Carries impulses from the CNS to glands, smooth muscle, and cardiac muscle under our voluntary control.
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Sympathetic Nervous System
Stimulates effectors and so speeds up activity
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Parasympathetic Nervous System
Inhibits effectors so slows down activity
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Other cards in this set

Card 2

Front

Sensory Neurone

Back

carries impulses from the receptor

Card 3

Front

Intermediate Neurone

Back

Preview of the front of card 3

Card 4

Front

Motor Neurone

Back

Preview of the front of card 4

Card 5

Front

Why are reflex actions fast?

Back

Preview of the front of card 5
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