Which type of neurotransmission accelerates a neuron's firing speed?

Excitatory neurotransmission is the process that accelerates a neuron's firing speed. This occurs when excitatory neurotransmitters, such as glutamate, bind to their receptors on the postsynaptic neuron. This binding leads to the depolarization of the neuron's membrane potential, making it more positive and closer to the threshold needed to trigger an action potential. When a sufficient number of excitatory signals are received, the neuron is more likely to fire, thus increasing its overall firing rate.

In contrast, inhibitory neurotransmission decreases a neuron's firing speed by hyperpolarizing the neuron and moving its membrane potential further away from the action potential threshold. This creates a less favorable environment for the initiation of action potentials. Other terms like "neutral" and "repetitive" do not pertain to recognized categories of neurotransmission that influence firing speed in this manner.