Across
- 3. End of a muscle that attaches to a relatively immovable part .
- 8. a chemical that an axon end secretes to stimulate a muscle fiber to contract on the neuron to fire and impulse
- 11. A protein in a muscle fiber forms filaments that slide between elements of the protein myosin, contracting muscle fibers.
- 13. Stimulus Stimulation level that must be exceeded to elicit a nerve impulse or a muscle contraction
- 14. Structural and functional unit of myofibril
- 15. sheet of fibrous connective tissue that encloses a muscle
- 16. neuron A neuron that transmits impulses from the central nervous system to an effector
Down
- 1. Contractile fibers within muscle cells
- 2. A narrow extracellular space between the presynaptic and postsynaptic neurons
- 4. Protein that, with actin, contracts and relaxes muscle fiber
- 5. Brief muscular contraction followed by relaxation.
- 6. tone Contraction of some fibers in skeletal muscle at any given time
- 7. Period Time between the application of a stimulus and the beginning of a response in a muscle fiber.
- 9. cordlike or bandlike mass of white fibrous connective tissue that connects a muscle to a mone
- 10. Time period following stimulation during which a neuron or muscle fiber will not respond to a stimulus
- 12. End of a muscle attached to a moveable part