Subdecks (2)

Cards (12)

  • Transmissions of nerve impulses 
    • Neurons transmit electrical impulses which travel extremely quickly along the neurons cell surface membrane from one end of the neuron to another 
    • Unlike a normal electric current, these impulses are not a flow of electrons 
    • These impulses are known as action potentials. They occur via very brief changes in distribution of electrical charge across the CSM 
    • Action potentials are caused by the rapid movement of sodium ions and potassium ions across the membrane of the axon 
  • Speed of conduction of impulses 
    Speed of conduction of an impulse refers to how quickly the impulse is transmitted along a neuron 
    • Determined by two main factors 
    • Presence of absence of myelin 
    • Diameter of the axon