Neurons

• What is a neuron?

  A neuron is a specialized cell that transmits information electrochemically.
• How do neurons transmit information?

  Neurons transmit signals electrochemically.
• What do dendrites do?

  Dendrites receive signals.
• What do axons do?

  Axons transmit signals away from the cell body.
• What percentage of neurons are located in the brain?

  80% of neurons are in the brain.
• What is the function of the cell body in a neuron?

  The cell body contains the nucleus and is responsible for maintaining the neuron's health.
• What is an axon?


  An axon is a long, thin structure that transmits signals away from the cell body.
• What is an axon terminal?


  An axon terminal is the endpoint of an axon where signals are transmitted to other neurons.
• What is a myelin sheath?

  A myelin sheath is a fatty layer that covers the axon and helps speed up signal transmission.
• What disease results from degeneration of the myelin sheath?

  Multiple sclerosis results from degeneration of the myelin sheath.
• What are the three types of neurons?

  • Sensory neurons
  • Motor neurons
  • Relay neurons
• What is the function of sensory neurons?


  Sensory neurons carry messages from sense receptors in the PNS to the CNS.