 The brain and spinal cord
 Nerves that branch out from the brain and spinal cord
and connect to sense and internal organs
 Automatic actions such as breathing
 Nerve path for impulses traveling to and from the
brain
 Part of the neuron which brings impulses to the cell
body
 Part of neuron which carries impulse away from cell
body
 Covering on the axon which keeps the electrical
impulse from traveling out of the axon
 Collects signals from receptor cells and sends them to
the brain or spinal cord
 Connects sensory neurons and motor neurons
 Messages from the brain and spinal cord go to the
motor neurons which are connected to muscle cells
 Gap between neurons
 Bypasses normal paths to brain and goes to the
spinal cord, where a decision is immediately made
and a signal goes to the motor neuron to cause a
quick reaction
 Sensor cells that send a signal to the sensory neuron
 Cells in muscles that are stimulated by the motor
neurons
Nervous System Vocabulary
Name_______________________________
1. Myelin –
2. Interneuron –
3. Synapse –
4. Receptor cells –
5. Central nervous system –
6. Autonomic nervous system –
7. Dendrite –
8. Sensory neuron –
9. Motor neuron –
10.
Reflex action –
11.
Effector cells –
12.
Peripheral nervous system –
13.
Neuron –
14.
Axon –