Topic 1.3

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Across
  1. 2. A motor neurone and the muscle fibres it controls.
  2. 3. Thin protein filament found in the myofibril
  3. 5. An increase in contraction strength as a result of muscles that are rapidly stimulated being unable to relax between repeated stimulations.
  4. 8. Thread-like protein that winds around the surface of actin.
  5. 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. 1. Nerves that carry information from the central nervous system to the skeletal muscles.
  2. 4. Part of a muscle fibre. Contains sarcomeres and the contractile proteins actin and myosin.
  3. 6. Thick protein filament found in the myofibril.
  4. 7. Globular protein on actin filament
  5. 9. The energy currency of the body. Found in all cells; when broken down it releases stored energy