MOTOR UNIT DEFINITIONS - OCR P.E. A-level/AS

Neuron
a nerve cell
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Axon
carries nerve impulse from cell body to the neuromuscular junction
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Neuromuscular junction
point where motor neurone communicates with muscle fibre across a synapse
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Synapse
gap between motor neurone and skeletal muscle
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Motor End-plate
Area of muscle fibre that establishes synaptic contact with motor neurone .
5 of 8
Type 1 muscle fibre
slow oxidative - small, low force of contraction over a long period of time
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Type 2A muscle fibre
fast oxidative glycolytic - force and time is between that of type 1 and 2B
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Type 2B muscle fibre
fast glycolytic - large, greatest force of contraction over a small period of time
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Other cards in this set

Card 2

Front

carries nerve impulse from cell body to the neuromuscular junction

Back

Axon

Card 3

Front

point where motor neurone communicates with muscle fibre across a synapse

Back

Preview of the back of card 3

Card 4

Front

gap between motor neurone and skeletal muscle

Back

Preview of the back of card 4

Card 5

Front

Area of muscle fibre that establishes synaptic contact with motor neurone .

Back

Preview of the back of card 5
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