The correct option is C Nerve impulse
∙ Nerve impulses are simply signals that are transmitted along nerve fibres (or neurons). It is the process by which neurons communicate with one another.
∙ The transmission of a nerve impulse along a neuron from one end to the other occurs as a result of difference in electrical charges across the membrane of the neuron.
∙ Nerve impulses can travel very quickly because they are electrical impulses.