Ch4B Nervous Communication

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Across
  1. 1. A rapid change in electrical charge that travels along the axon of a neuron.
  2. 5. The return of the membrane potential to its resting state after depolarization.
  3. 6. The principle that a neuron either fires an action potential completely or does not fire at all; there are no partial impulses.
  4. 7. The electrical signal that travels along a nerve fiber.
  5. 12. Chemical substances released from neurons that transmit chemical signals to another neuron or muscle.
  6. 13. The process by which nerve impulses jump from one node of Ranvier to another, speeding up transmission.
  7. 15. The process of reducing the charge difference across a neuron's membrane.
  8. 16. The individual action potential of a single neuron.
Down
  1. 2. The minimum change in voltage needed to trigger an action potential.
  2. 3. The junction between two neurons where communication occurs via neurotransmitters.
  3. 4. The specialized synapse between a motor neuron and a muscle fiber, facilitating muscle contraction.
  4. 8. The electrical charge difference across a neuron’s membrane when it is not firing an impulse.
  5. 9. An increase in the charge difference across the membrane, making it less likely to fire an action potential.
  6. 10. The time after an action potential during which a neuron cannot fire another impulse.
  7. 11. The collective electrical activity across multiple neurons.
  8. 14. The height of the action potential signal, reflecting its strength.