Across
- 2. Membrane potential dips below resting after an action potential
- 6. Return of the membrane potential toward resting value
- 9. Thin filament protein in muscle
- 12. Synapse between a motor neuron and muscle fiber
- 14. Required to release myosin from actin
- 15. Neurotransmitter released by most sympathetic postganglionic neurons
- 20. The basic contractile unit of striated muscle
- 21. Ion that exits the neuron during repolarization
- 22. Senses stretch in skeletal muscl
- 23. Membrane potential becomes less negative during this phase
- 24. "Rest and digest" branch of the autonomic nervous system
- 27. Motor protein forming thick filaments
- 28. ANS neurons that contact target organs
- 30. Channel releasing calcium from the SR
Down
- 1. ANS neurons that originate in the CNS
- 3. Cholinergic receptor found at the neuromuscular junction
- 4. Sustained muscle contraction from repeated stimuli
- 5. Ion that triggers muscle contraction
- 7. Level a membrane must reach to fire an action potential
- 8. Ion that flows into the cell during depolarization
- 10. Parasympathetic receptor on target organs
- 11. "Fight or flight" division of the autonomic nervous system
- 13. Enzyme that degrades ACh in the synapse
- 16. Neurotransmitter used by all somatic motor neurons
- 17. Type of conduction in myelinated neurons
- 18. A motor neuron and its muscle fibers
- 19. Endocrine gland acting like a sympathetic ganglion
- 25. Binds calcium to initiate contraction
- 26. Increases conduction velocity in axons
- 29. Blocks nicotinic ACh receptors, causing paralysis