Across
- 2. A motor neurone and the muscle fibres it controls.
- 3. Thin protein filament found in the myofibril
- 5. An increase in contraction strength as a result of muscles that are rapidly stimulated being unable to relax between repeated stimulations.
- 8. Thread-like protein that winds around the surface of actin.
- 9. The law that states each muscle fibre within a motor unit either contracts or does not contract – there is no such thing as a partial contraction.
Down
- 1. Nerves that carry information from the central nervous system to the skeletal muscles.
- 4. Part of a muscle fibre. Contains sarcomeres and the contractile proteins actin and myosin.
- 6. Thick protein filament found in the myofibril.
- 7. Globular protein on actin filament
- 9. The energy currency of the body. Found in all cells; when broken down it releases stored energy