Edexcel Biology - Topic 8 - Nervous System

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  • Created by: Henry
  • Created on: 14-05-14 09:54
The part of the nervous system consisting of the brain and spinal cord
Central
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The part of the nervous sytem consisting of sensory and motor nerves
Peripheral
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Part of the PNS that involuntarily controls smooth muscle, cardiac muscle and glands
Autonomic
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Part of the PNS that voluntarily controls skeletal muscle
Somatic
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Part of the autonomic nervous system that prepare the body for 'fight or flight' responses
Sympathetic
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Part of the autonomic nervous system that prepare the body for 'rest and digest' responses
Parasympathetic
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The type of neurone with its cell body at one end
Motor
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The type of neurone with its cell body located off the axon
Sensory
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The type of neurone with its cell body within the axon
Relay
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the long thread-like part of a nerve cell along which impulses are conducted from the cell body to other cells
Axon
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Extensions of a nerve cell which receive impulses and conduct them towards the cell body
Dendrites
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Cell which forms the myelin sheath around an axon
Schwann Cell
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A gap in the myelin sheath of a nerve, between adjacent Schwann cells
Node of Ranvier
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A bundle of nuerones held together
Nerve
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Cell which repsonds to a stimuli by generating an impulse to a sensory neurone
Receptor
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An organ or cell which acts in repsonse to a stimulus
Effector
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The membrane to which synaptic vesicles bind releasing neurotransmitter into the synaptic cleft
Presynaptic
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The membrane containing receptor proteins which neurotransmitter binds to initiating an action potential
Postsynaptic
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The chemical substance used to pass impulses across the synaptic cleft e.g. Acetylcholine
Neurotransmitter
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A synapse in which an action potential in the presynaptic membrane increases the likelihood of an action potential in the postsynaptic membrane
Excitatory
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A synapse in which an action potential in the presynaptic membrane decreases the likelihood of an action potential in the postsynaptic membrane
Inhibitory
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Type of summation where multiple neurones are needed to initiate an action potential
Spatial
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Type of summation where multiple impulses from on neurone are needed to initiate an action potential
Temporal
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Other cards in this set

Card 2

Front

The part of the nervous sytem consisting of sensory and motor nerves

Back

Peripheral

Card 3

Front

Part of the PNS that involuntarily controls smooth muscle, cardiac muscle and glands

Back

Preview of the front of card 3

Card 4

Front

Part of the PNS that voluntarily controls skeletal muscle

Back

Preview of the front of card 4

Card 5

Front

Part of the autonomic nervous system that prepare the body for 'fight or flight' responses

Back

Preview of the front of card 5
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