Skeletal Muscle

123456789101112131415161718192021
Across
  1. 5. One motor neuron and all of the muscle cells it controls
  2. 6. Repeating unit of a muscle fiber, extending from one Z-line to the next
  3. 8. Thin filament protein in sarcomeres
  4. 10. Released from myosin to trigger the power stroke
  5. 11. Striated voluntary muscle tissue
  6. 13. Continuous muscle contraction without relaxation
  7. 15. Shortening muscle contraction
  8. 16. Muscle contraction with no change in length
  9. 17. Time in skeletal muscle to release Ca²⁺ before contraction begins
  10. 19. Region of the sarcomere that contains thick filaments
  11. 21. Organelles that store calcium ions and are found in muscle fibers
Down
  1. 1. Protein that prevents myosin from binding to actin in a relaxed muscle
  2. 2. Structures that help transmit action potentials deep into the muscle fibers for contraction
  3. 3. Thick filament protein in sarcomeres
  4. 4. Protein that binds Ca²⁺ to initiate muscle contraction
  5. 7. Process of activating additional motor neurons to increase muscle force
  6. 9. Neurotransmitter released by somatic motor neurons at the NMJ
  7. 12. Summation needed to hold an object in a certain position constantly
  8. 14. At the NMJ, acetylcholine binds to these receptors on skeletal muscle
  9. 18. Loss of force that a muscle has over time due to long term stimulation
  10. 20. Molecule that lets myosin release actin after the power stroke