Across
- 2. General function of the nervous system is to control and ______ the body
- 4. Electrical difference across membrane
- 5. The trigger zone of a neuron
- 6. Neuron classification includes multipolar, bipolar, and ______
- 7. Jumping conduction in myelinated axons
- 8. Period when stronger stimulus is needed
- 10. Period when neuron cannot fire another action potential
- 11. Ion responsible for repolarization
- 14. CNS support cells that regulate environment
- 15. Excitatory postsynaptic potentials
- 16. Gaps in myelinated axons (nodes of ______)
- 17. Inhibitory postsynaptic potentials
- 22. The nervous system is divided into central and ______ systems
- 23. Ion responsible for depolarization
- 24. Nervous system including brain and spinal cord
- 26. Branch-like structures that receive signals
- 29. Channels that open in response to voltage changes
- 34. CNS cells that produce myelin
- 35. Neurotransmitter binding causes ______ potential
- 36. Adding signals together
- 37. Cells that support neurons
Down
- 1. Type of synapse communication using chemicals
- 3. Chemical messengers released from neurons
- 9. Receptors that act directly on ion channels
- 12. Membrane potential becoming more negative
- 13. Long projection that carries impulses away from the soma
- 14. Neurotransmitter involved in muscle contraction
- 18. Rapid change in membrane potential is called an ______ potential
- 19. Channels that open due to chemicals
- 20. All-or-none signal in neurons
- 21. Neurotransmitter associated with mood and sleep
- 25. Neurons classified by direction: sensory, motor, and ______
- 27. Receptors that act indirectly
- 28. End of neuron that releases neurotransmitters
- 30. Nervous system compared to ______ system
- 31. Drugs/toxins affect neuron ______
- 32. Junction between neurons
- 33. The part of the neuron that contains the nucleus