Across
- 6. A motor neuron and all the muscle fibers that it controls
- 7. Enzyme which breaks down ACh
- 11. Phase that lasts 15msec, tension increases at peak
- 13. Phase that lasts about 25msec, the period after the contraction when the tension in the muscle fiber returns to resting levels
- 14. The maximum amount of tension produced by a particular muscle or muscle group
Down
- 1. Contraction that exceeds the load and the muscle shortens
- 2. This thin filament protein pulls the tropomyosin binding site on actin
- 3. The resting tension in a skeletal muscle
- 4. Skeletal muscle fiber contraction begins with the release of ___
- 5. In ___tetanus a muscle almost produces peak tension
- 8. Contraction that changes is tension but not length
- 9. The synaptic knob contains vesicles of this neurotransmitter
- 10. The amount of time during which a person can perform a particular activity
- 12. A single stimulus contraction relaxation cycle in a muscle fiber
- 13. Steady increase in muscular tension produced by increasing the number of active motor units