Final answer:
Neurons can form synapses and communicate with other neurons, muscle cells, and secretory cells. This neuronal communication is essential for the nervous system to interact with different parts of the body and is facilitated by the release of neurotransmitters across synapses.
Step-by-step explanation:
Neurons can communicate with (form synapses on) d. all of the above: other neurons, muscle cells, and secretory cells. Neuronal communication occurs at a junction known as a synapse, where the terminal branches of an axon and the dendrites of another neuron are in close proximity. Information is transmitted across the synaptic gap by chemical secretions called neurotransmitters, which cause activation in the post-synaptic cell.
Neurotransmitters are released from the axon terminals and they can transmit signals through synapses into other neurons, muscle cells, or secretory cells. These signals are sent along the neuron's axon to elicit a response in the target cells. This complex system allows the nervous system to communicate with various parts of the body, control muscle movement, and interact with the endocrine system through secretory cells.