2. The parts of neurons that send messages are the axons, and the parts of neurons that receive messages are the dendrites. 3. The space between the dendrites of one neuron and the axon of another neuron is called the synapse. 4. The nucleus of a neuron is where genetic material is stored. 5. Neurons that send information from sensory organs, such as the skin or eyes, to the central nervous system are called sensory (or afferent) neurons. 6. Neurons that send information from the central nervous system to muscles or glands are called motor (or efferent) neurons. 7.