Structure & Function of Neurons

• label the following

  .

  A) nodes of Ranvier

  B) relay neuron

  C) cell body

  D) dendrites

  E) conduction

  F) myelin sheath

  
• which neuron is the only one without a myelinated sheath?

  relay
• cell body

  includes a nucleus containing genetic material
• dendrites

  branch-like structures protruding from the cell body and they carry nerve impulses
• axon


  carries impulse away from cell body
• myelin sheath

  covers axons as a fatty layer and protects it; speeds up transmission
• nodes of ranvier


  gaps between the myelin sheath; sheath speeds up transmission by forcing it to jump across gaps
• terminal buttons

  communicates with the next neuron across the synapse
• sensory neuron

  receives sensory info from sensory receptors and transmit it to brain
• relay neuron

  processes and transforms info from sensory neuron
• motor neuron

  transmits info from brain to muscles; muscle movement