Chapter 6 Crossword Puzzle Muscular System

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Across
  1. 2. the force exerted by a contracting muscle
  2. 3. end of a muscle that attaches to another bone across a joint
  3. 6. the amount of oxygen required after exercise to oxidize the lactic acid formed by anaerobic metabolism
  4. 8. a somatic motor neuron and all of the muscle cells that it stimulates
  5. 9. one of the principle contractile proteins found in muscle composed of thick filaments with cross-bridges
  6. 10. decline in muscle performance during exercise
  7. 11. region where a motor neuron comes in close contact with a muscle cell
  8. 14. end of a muscle that is attached to the bone that does not move during muscular contraction
  9. 15. single muscle cell
Down
  1. 1. smallest contractile unit of a muscle myofibril
  2. 4. neuron in the PNS that conducts nerve impulses from the CNS to thr body, tissue, and organs
  3. 5. specialized endoplasmic reticulum of muscle cells that surrounds the myofibrils and stores Calcium
  4. 7. a complete cycle of contraction and relaxation of a muscle cell
  5. 12. increasing the tone of a muscle by activating more motor units
  6. 13. a contractile protien