Across
- 2. feather
- 5. movers are muscles causing the desired action
- 7. muscles have a rounded fiber arrangement
- 8. refer to body positions maintained by muscle contractions. Ex. Sitting and standing
- 10. muscles have fibers joining at one end with fibers spreading out like a fan at the other end
- 12. cell membrane surrounding muscle fibers. Folds in the sarcolemma are called motor end plates, which are where muscle fibers receive signals to contract from their associated motor neutrons.
- 14. together, work
- 15. towards the middle
- 16. muscles twist between their points of attachments.
- 18. away from the middle
- 19. muscle
- 20. specialized synergists that stabilize joints or help maintain posture so prime movers can exert their action
- 21. same or equal measure
Down
- 1. or muscle cells, have a distinct threadlike shape and often run the length of the muscle. Also contain multiple mitochondria and nuclei
- 2. muscles have their fibers arranged along the long axis of bone and usually tapered at both ends or are spindle shaped.
- 3. strong central structural unit or band
- 4. Muscle contractions produce heat – this mechanism is called thermogenesis and maintains the body's temperature.
- 6. same or equal tension
- 9. intracellular fluid within the muscle fibers and is equivalent to cytoplasm in typical cells.
- 11. lacking, without, not; to grow
- 13. muscle fibers contain thousands of slender strands called myofibrils. They lay side to side and run the length of each muscle fiber.
- 14. flesh
- 17. to struggle against
- 22. Skeletal muscles contract to pull on bones, producing movement. There are approximately 640 skeletal muscles in the body. Contraction of skeletal muscles also promotes the movement of blood and lymph.