Nervous System Crossword Puzzle

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Across
  1. 2. – Tiny gaps in the myelin sheath where the axon membrane is exposed, allowing action potentials to travel faster
  2. 3. – The voltage difference measured across the membrane of a neuron at any moment
  3. 7. – A nerve cell that carries impulses from a sensory receptor or organ toward the central nervous system
  4. 13. – The neuron that is upstream of a synapse, releasing neurotransmitters into the gap
  5. 16. – A specialized cell or nerve ending that responds to a specific stimulus (like light, heat, or pressure) and triggers an action potential
  6. 17. – Cells that wrap around axons in the peripheral nervous system to form the insulating myelin sheath
  7. 20. – A fine, fibrous branch on a neuron that receives incoming impulses from other neurons
  8. 21. – A specialized cell within the nervous system that transmits electrical impulses from one place to another
  9. 22. – A chemical substance released from the end of a neuron that diffuses across the synaptic cleft and transmits the signal to the next cell
  10. 23. – A neuron inside the central nervous system that passes electrical impulses from a sensory neuron to a motor neuron
Down
  1. 1. – A rapid, temporary change of the potential from about –70 mV to +40 mV that travels along a neuron
  2. 4. A nerve cell that carries electrical impulses away from the central nervous system toward muscles or glands
  3. 5. – The part of the vertebrate nervous system consisting of the brain and spinal cord, abbreviation
  4. 6. – The network of nerves that carries sensory information to the central nervous system and sends impulses to muscles and glands, abbreviation
  5. 8. – A bundle of many nerve fibers that connects the central nervous system with various parts of the body
  6. 9. – The state of a cell membrane where one side has a positive electrical charge and the other side has a negative charge
  7. 10. – The single long fiber of a neuron that carries impulses away from the cell body toward the synapse
  8. 11. – The insulating layer around many axons that speeds up electrical impulse transmission
  9. 12. – The neuron that is downstream of a synapse, receiving neurotransmitters and generating a new signal
  10. 14. – The stable electrical difference across a nerve cell membrane when it is not transmitting a signal, typically about –70 mV
  11. 15. – The tiny gap between the end of one neuron and another cell, where neurotransmitters carry the signal across
  12. 18. – A common neurotransmitter that functions in both the central and peripheral nervous systems, notably at nerve-muscle junctions
  13. 19. – A fiber that carries electrical impulses toward the cell body of a neuron (distinct from the multiple fine dendrites)