Neurons and electrical transmission

• What are the three types of neurons?

  Sensory, relay, motor
• What is the function of sensory neurons?

  Transmit signals from PNS to CNS
• How do relay neurons function?

  Connect sensory neurons to motor neurons
• What is the role of motor neurons?

  Transmit signals from CNS to muscles/glands
• What does the cell body of a neuron contain?

  Nucleus containing DNA
• What is the function of the axon?

  Carries signal covered in myelin sheath
• What is the myelin sheath's role?

  Insulates axon and speeds up signal
• What are the gaps in the myelin sheath called?

  Nodes of Ranvier
• What is the terminal button?

  End of axon, part of synapse
• What is the resting state of a neuron?

  Negative charge inside the cell
• What happens when a neuron fires?

  The charge inside the cell changes
• What is created when a neuron fires?

  An action potential