Across
- 4. The nerve that causes a reduction in heart rate
- 7. The neurotransmitter primarily responsible for the parasympathetic nervous system
- 10. The part of the motor nervous system involved in involuntary actions
- 13. Muscles do this to enable movement
- 16. The lighter area on the outside of the sarcomere with is actin only
- 17. The natural pacemaker of the heart
- 19. The part of the autonomic nervous system that is rest and digest
- 20. The form of muscle found in the heart
- 21. These are the skeletal muscle cells
- 23. A short-term source of phosphate groups in cells
- 26. The fact that heart muscle can stimulate its own beat
- 27. The lighter area of a sarcomere in the middle which is only myosin
- 28. The part of the autonomic nervous system that prepares for fight and flight
- 29. The process in cells that releases 32 ATP
- 30. The process in cells that releases only 2 ATP
Down
- 1. The neurotransmitter primarily responsible for the sympathetic nervous system
- 2. The part of the brain responsible for autonomic functions
- 3. This ion is needed for muscle contraction
- 5. The term given to the specialised cell surface membrane of a muscle fibre
- 6. The thicker muscle myofilament
- 8. A bundle of muscle fibres that group together to make a muscle
- 9. The involuntary muscle found in the arteries, breathing system and digestive system
- 11. The area that represents the full length of myosin
- 12. The thinner muscle myofilament
- 14. The part of the motor nervous system involved in voluntary actions
- 15. The term given to the cytoplasm in a muscle fibre
- 18. The nerve that stimulates an increase in heart rate
- 22. This protein runs over the surface of actin and blocks the actin binding sites
- 24. The contractile unit of a myofibril that runs from Z to Z
- 25. This protein is associated with actin and plays a role in the cross-bridge cycle