Final answer:
Most synaptic transmissions are chemical communications. In chemical synapses, neurotransmitters relay signals across the synaptic cleft to the postsynaptic neuron, which is a process that is integral to neural communication and more common than electrical synaptic transmission.
Step-by-step explanation:
Most synaptic transmissions between neurons are chemical communications. During a chemical synapse, neurotransmitter molecules are released from the presynaptic neuron's synaptic vesicles into the synaptic cleft. These molecules then bind to receptors on the postsynaptic neuron's membrane, causing a change in its potential. This process is time-limited as the neurotransmitter must be inactivated or removed from the synaptic cleft afterward. Chemical synapses account for the majority of synapses within the nervous system and are essential for neural communication, although there are also electrical synapses that allow for direct passage of ions between cells, enabling nearly instantaneous transmission.