Neuromuscular System

3. A motor neurone and its muscle fibres.
7. Fast glycolytic- These fibres fatigue much quicker than type IIa and are used for highly explosive events where quick, short burst of energy are needed e.g. 100m.
8. Exercise at high intensity such as sprinting where the demand for oxygen by the muscles is so high that it cannot be met.
11. Sequence of impulses has to be of sufficient intensity to stimulate all of the muscle fibres in a motor unit in order for them to contract. If not, none will contract.
13. Where there is a repeated nerve impulse with no time to relax so a smooth,sustained contraction occurs rather than twitches.
14. Transmit the brains instructions as electrical impulses to the muscles.
15. Fibres Slow contraction speeds. Adapted to low intensity exercise, producing most of their energy aerobically.
17. When the strength of a contraction changes by altering the number and size of the muscle’s motor units.

1. Where there is a sudden relaxation of the muscle in response to high tension.Golgi tendons are the receptors involved.
2. Where the motor neurone and the muscle fibre meet.
4. Where there is tension in a muscle but no visible movement.
5. A sustained muscle contraction caused by a series of fast repeating stimuli.
6. Fast oxidative glycolytic- More resistant to fatigue than type 1 fibres. Suited to longer high intensity exercise e.g. 1500m.
9. Where the muscle becomes bigger and stronger.
10. Activated when there is tension in a muscle.
12. Exercise that is low to medium intensity where the oxygen demand of the muscles can be met.
16. Detect how far and how fast a muscle is being stretched and produce the stretch reflex.