Which of the following statements is true with regard to communication in the nervous system?

• A. Neurotransmitters are released from the axon terminal into the synaptic cleft to transmit signals to the next neuron.
• B. Communication between neurons occurs only through electrical impulses and never involves chemicals.
• C. The myelin sheath slows down the transmission of neural signals.
• D. Dendrites generate action potentials that travel down the axon.

Answer: (A)

Verified step by step guidance

1. Understand that communication in the nervous system primarily occurs at the synapse, which is the junction between two neurons.
2. Recall that neurons transmit signals using both electrical impulses (action potentials) and chemical messengers called neurotransmitters.
3. Recognize that neurotransmitters are released from the axon terminal of one neuron into the synaptic cleft, where they bind to receptors on the next neuron to continue the signal.
4. Know that the myelin sheath actually speeds up the transmission of neural signals by insulating the axon and allowing faster electrical conduction.
5. Remember that dendrites receive incoming signals but do not generate action potentials; action potentials are generated at the axon hillock and travel down the axon.