Final answer:
Neurotransmitters are the chemical messengers that cross synapses to transmit nerve signals to target cells, with acetylcholine and dopamine being examples of such molecules. Option B is correct
Step-by-step explanation:
The term for the chemical messengers that cross the synapse between the neuron and muscle and assist with nerve transmission is neurotransmitters.
Neurotransmitters are endogenous chemicals that enable neurotransmission, transmitting signals from one neuron to a target neuron, muscle cell, or gland cell. This transmission is essential for relaying nerve impulses across the synaptic gap, and these neurotransmitters may be excitatory or inhibitory, affecting the likelihood of an action potential in the postsynaptic neuron.
Acetylcholine is an example of a neurotransmitter released by axons at synapses, while dopamine, another neurotransmitter with the molecular formula C8H11NO2, is involved in various neurological processes and neurological diseases such as Parkinson's and schizophrenia.