LS 5.3.2

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Across
  1. 1. Muscle cells are composed of threads called this.
  2. 5. Heat keeps the body warm, and the muscles convert the energy into____.
  3. 6. Muscles are found in all body _____.
  4. 7. If the body's supply of this is low, muscles will pull it from bones and risk weakening them.
  5. 8. Muscle cells or fibers are organized into muscle ____.
  6. 10. Cardiac muscles cells _____ very efficiently.
  7. 13. Because cardiac muscle needs to work constantly, cardiac muscle cells have many ____ which produce energy for cells.
  8. 14. Smooth muscle is an _____muscle because hormones and nerves automatically cause it to contract and relax.
  9. 17. Muscles take in nutrients and relase heat and _____.
  10. 19. This disease destroys skeletal muscle tissue.
  11. 22. This can change the size of muscle cells.
  12. 24. Skeletal muscles marked by stipes or bands.
  13. 26. Exercise can cause fast-twitch muscle cells to develop more mitochondria to help the cells resist fatigue.
  14. 27. This type of muscle is found only in the heart.
Down
  1. 2. These fibers in muscles react more quickly to nerve messages and they tend to fatigue quickly. (hyphen in answer)
  2. 3. Some smooth muscle, such as the digestive tract, contracts ________.
  3. 4. About 40% of the body weight is this type of muscle. They are attached throughout the body by tendons.
  4. 5. Muscle cells are long cylinder shaped, which is why they are also called this.
  5. 9. Skeletal muscles are ____ which means you can control their use.
  6. 11. This system contains glands that affect muscle activity and growth.
  7. 12. Growing muscle cells need ____ ____ to be able to process protein and carbohydrates for fuel.
  8. 15. Cardiac muscles rest between _____.
  9. 16. These are painful muscle cantractions triggered by an irritation within the muscle.
  10. 18. The term used to describe the shrinking of muscles.
  11. 20. These fibers are rich in mitochondria and bloody supply allowing them to resist fatigue. (hyphen in answer)
  12. 21. A network of _____ connects muscles to the brain.
  13. 23. Chronic widespread pain in muscles or at teh point where muscles join tendons.
  14. 25. This type of muscle reacts slowly and tires slowly.