Correct Response: A. The central nervous system consists of the brain and spinal cord. The nerves of the peripheral nervous system originate in or near the central nervous system and extend to the different regions of the body. Because of this, the axons in the peripheral nervous system must be longer. Dendrites are the extensions of a nerve cell that receive signals from other nerve cells. The nerve cells within the peripheral nervous system do not have significantly more dendrites than those located in the central nervous system (B). Synapses in the central and the peripheral nervous system both use neurotransmitters to transmit chemical signals (C). Impulses in the peripheral nervous system flow both to and from the central nervous system (D).
