Motor Units Paper 1 TO DO Flashcards
1
Q
What is a motor neuron
A
A nerve cell which conducts a nerve impulse to a group of muscle fibres
2
Q
What is a motor unit
A
A motor neuron and the muscle fibres stimulated by its axon
3
Q
What is action potential
A
Positive electrical charge inside the nerve and muscle cells
4
Q
What is a neurotransmitter
A
A chemical produced by and secreted by a neuron which transmits the nerve impulse across the synaptic cleft to the muscle fibre
5
Q
All or non law
A
All muscle fibres will give a complete contraction or no contraction at all
6
Q
Phosphocreatine
A
A high energy component stored in the muscle cells
