The Structure and Function of Neurons

• What are the three types of neurons?

  Sensory neurons, relay neurons, and motor neurons
• What are the main components of a neuron?

  • Cell body
  • Dendrites
  • Axon
• What is the function of dendrites in a neuron?

  Dendrites receive signals from other neurons or sensory receptors
• What role does the cell body play in a neuron?

  The cell body is the control center of the neuron
• What happens to impulses after they are sent out from the cell body?

  They travel along the axon and terminate at the axon terminal
• What is the function of the myelin sheath?

  The myelin sheath insulates the axon and allows nerve impulses to transmit more rapidly
• What occurs if the myelin sheath becomes damaged?

  It can slow down the transmission of nerve impulses
• What is the range of lengths that neurons can vary from?

  From a few millimeters up to one meter