Nervous System

• Nervous system


  Allows us to perceive and comprehend and respond to environmental stimuli
• Components of the nervous system

  • Sensory neuron
  • Relay neuron
  • Motor neuron
• Sensory neuron


  • Detects sensations at receptors
  • AP travels along myelinated axon
  • Conversion of electrical signal to chemical signal occurs to cross the synapse
• Relay neuron


  • After synaptic transmission, sends a signal to the CNS
  • Immediately sends signal along axon to motor neuron
• Motor neuron


  • Synaptic transmission
  • Detects and passes relay neuron's signal along myelinated axon
  • Stimulates effector