Across
- 5. Upper arm muscle responsible for Extension of the elbow.
- 8. Protein that helps regulate muscle contraction by binding calcium.
- 9. Actin and myosin are ____?
- 12. The cell membrane surrounding a muscle fiber.
- 17. The basic unit of muscle contraction.
- 18. Protein that blocks actin binding sites during relaxation.
- 19. Lifting the foot.
- 20. Thin filament in muscular contraction.
- 21. Upper arm muscle responsible for Flexion of the elbow.
- 22. Exercise or activity requiring oxygen
- 23. Thick filament in muscular contraction.
- 24. Decreasing angle of a limb such as the elbow.
- 25. Connective tissue surrounding an entire muscle.
- 27. Released to trigger muscle contraction by binding to troponin.
- 28. Muscle that forms a diamond shape on the back.
- 29. Neurotransmitter released at the neuromuscular junction.
- 30. Forms a junction with the sarcolemma of a muscle cell.
Down
- 1. Organelle that stores calcium ions in muscle cells.
- 2. The connection formed between actin and myosin during contraction.
- 3. Increasing the angle of a limb such as the elbow.
- 4. Connection where nerve and muscle fibers communicate.
- 6. First source of energy to be depleted.
- 7. The gap between a neuron and a muscle cell where neurotransmitters are released.
- 10. Movement of a limb away from the midline.
- 11. Filled with a chemical messenger known as a neurotransmitter.
- 13. Exercise or activity that doesn’t require oxygen, used for quick, intense effort.
- 14. Electrical signal that travels along nerves to trigger muscle contraction.
- 15. Energy molecule required for muscle contraction and relaxation.
- 16. Connective tissue surrounding bundles of muscle fibers (fascicles).
- 26. Movement of a limb towards the midline.