Nervous System Crossword

3. Rapid, all-or-none electrical signal that travels along the axon
6. Transmits information to and from the CNS using nerves and ganglia
11. Small, local change in membrane potential that varies with stimulus strength
14. Neuron with one dendrite and one axon
15. Membrane becomes more negative than resting potential
16. Neuron with many dendrites and one axon; most common type
18. Excitable cell that transmits electrical signals in the nervous system
19. Carries information from receptors to the CNS (afferent)
20. Contains nucleus and integrates incoming signals from dendrites
21. Electrical charge difference across membrane at rest (~ -70 mV)
24. Long neuron branch that conducts impulses away from the cell body
25. Membrane returns to negative state due to K+ leaving the cell

1. Non-excitable support cells that protect, nourish, and assist neurons
2. Chemical messenger released at synapse to transmit signals
4. Insulating layer around axons that increases speed of signal transmission
5. The communication and control network that collects, processes, and responds to information in the body
7. Short neuron branches that receive incoming signals
8. Processes and integrates information within the CNS
9. Neuron with a single process that branches like a T
10. Processes information and includes the brain and spinal cord
12. Membrane becomes less negative due to Na+ entering the cell
13. Fast signal transmission in myelinated axons jumping between nodes
17. Carries signals from CNS to effectors like muscles (efferent)
22. Region where action potentials are initiated (trigger zone)
23. Minimum voltage (-55 mV) needed to trigger an action potential