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16 Cards in this Set
- Front
- Back
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Stimulus |
a change in the environment that triggers a response |
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Receptors |
Specialised cells that detect a change |
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Stimulus response model |
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Voluntary Response |
- Neural message goes to the brain - conscious control of response |
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Involuntary Response |
- Neural message only goes to the spinal cord - no conscious control of the response |
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Central Nervous System |
The receptors send a message to |
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Why are some parts of the body more sensitive than others? |
Some nerve's are more sensitive because they have greater amounts of recepter cells |
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Reflex Response |
A reflex response is automatic ,rapid and it's function is protection |
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Reflex Arc |
The reflex responses travel through the reflex arc Stimulus > receptor > sensory neuron > CNS > relay neuron > motor neuron > effector > response |
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Synapses |
Between neurons are small gaps called synapsess |
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neurotansmitters |
Electrical impulses are converted to chemicals called neurotransmitters |
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Neurotransmitters types |
Adrenalin - associated with alertness Dopamine - associated with emotions Serotinin - mood, body temperature |
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three main parts of nervous system |
the brain, the spinal cord, nerve fibres |
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Systems |
Central Nervous System ( CNS ) : brain and spinal cord Peripheral Nervous System ( PNS ): All other neural paths |
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Nerve Fibres |
Nerve Fibres are bundles of nerve cells (neurons) that pass signs ( impulses ) to the brain |
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How do Nerve Fibres work? |
From the CNS, nerve fibres send impulses ( signs ) to the effectors ( muscle/ glands ) |
