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Compare Impulse Transmission Along Axon & At Synapse





                                                 At synapse                                                   Along the axon



                               Occurs between 2 neurons / between                               Occurs along axon of a single

                               presynaptic neuron & potsynaptic neuron                          neuron


                               Impulse is chemically transmitted                                Impulse is electrically transmitted






                               Involves neurotransmitters                                       No neurotransmitters involved




                               Speed of impulse transmission is                                 Speed of impulse transmission is


                               relatively slower                                                relatively faster


                               Involves the diffusion of Ca                    2+  into         Does not involves the diffusion of
                               the presynaptic neuron                                           Ca   2+   into axon


                               Involves ligand gated ion channels                               Does not involves ligand gated ion channels but

                                                                                                                                           +
                                                                                                                                  +
                                                                                                involves voltage gated Na and K ion channels
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