Which type of neurotransmitter promotes the continuation of a signal in nerve communication?

The correct answer is that excitatory neurotransmitters play a crucial role in promoting the continuation of a signal in nerve communication. These neurotransmitters facilitate the excitement or activation of a nerve signal, leading to the depolarization of the postsynaptic neuron. When an excitatory neurotransmitter binds to its receptor, it typically results in the opening of ion channels that allow positively charged ions to flow into the neuron, increasing its chances of firing an action potential. This process is essential for transmitting messages throughout the nervous system effectively, influencing various functions such as mood, movement, and cognition.

In contrast, inhibitory neurotransmitters work to halt or reduce the activity of the nerve signal, leading to a calming effect on neuronal activity. While calming and relaxative may describe effects on mood or behavior, they do not directly pertain to the mechanism of continuing a nerve signal. Thus, excitatory neurotransmitters play a fundamental role in ensuring that signals can be communicated onward in the nervous system.