Across
- 4. branching ends of the axon/neuron
- 8. electrical current that travels through a muscle cell after the increase in positive ions
- 11. organelle in muscle cells that releases calcium
- 13. the number of contractions that occur after one action potential
- 14. when a muscle cell contracts and relaxes very quickly one time
- 15. neurotransmitter released from the axonal terminals
- 17. when skeletal muscle contracts, it does this
- 18. stimuli are delivered at an even faster rate and the muscle cell cannot relax
Down
- 1. where the myosin heads attach to actin
- 2. immune disorder that causes the immune system to attack acetylcholine receptors
- 3. stiffening of muscles after death due to lack of ATP
- 5. where acetylcholine attaches to the sarcolemma
- 6. gap between axonal terminals and the sarcolemma
- 7. a smooth contraction without any muscle relaxation
- 9. ion that muscle cells are temporarily permeable too after acetylcholine attaches
- 10. "muscle cells either contract completely or not at all"
- 12. one neuron and all the muscle cells it stimulates
- 16. element that frees actin so the myosin heads can attach
- 19. proteins that break down acetylcholine after they attach