Concept 48.1  Nervous systems consist of circuits of neurons and supporting cells	48.01
 Concept 48.2  Ion pumps and ion channels maintain the resting potential of a neuron	48.02
 Concept 48.3  Action potentials are the signals conducted by axons	48.03
 Concept 48.4  Neurons communicate with other cells at synapses	48.04
 Concept 48.5  The vertebrate nervous system is regionally specialized	48.05
 Concept 48.6  The cerebral cortex controls voluntary movement and cognitive functions	48.06
 Concept 48.7  CNS injuries and diseases are the focus of much research	48.07
Activity: Neuron Structure	48&A
Activity: Nerve Signals: Action Potentials	48&B
Activity: Signal Transmission at a Chemical Synapse	48&C
Investigation: What Triggers Nerve Impulses?	48&A