Which of the following best describes the function of neurotransmitters like acetylcholine?

The function of neurotransmitters, such as acetylcholine, is primarily to facilitate communication between neurons. Neurotransmitters are chemical messengers that are released from the presynaptic terminal of one neuron and bind to receptors on the postsynaptic neuron, allowing the transfer of information across synapses. This process is critical for the propagation of signals throughout the nervous system, enabling various functions such as muscle contraction, mood regulation, and cognitive processes.

Though some options relate to different aspects of neural function, they miss the broader role of neurotransmitters. For example, transmitting electrical signals along neurons refers to the action potential that travels down the axon, which is not the role of neurotransmitters; instead, that involves the movement of ions across the neuron's membrane. Moreover, while neurotransmitters play a part in muscle movements through neuromuscular junctions, they do not control these movements exclusively, as other systems and factors are involved in the coordination of motor actions. Storing information in the brain pertains more to the role of synapses and neural plasticity rather than the direct function of neurotransmitters alone.