| 1. | By releasing neurotransmitters across the synaptic cleft |
| 2. | Through the direct movement of ions via gap junctions |
| 3. | By synaptic vesicles fusing with the postsynaptic membrane |
| 4. | Through saltatory conduction at the nodes of Ranvier. |
| I: | Chemical synapses use neurotransmitters to transmit impulses. |
| II: | Nodes of Ranvier are gaps in the myelin sheath of axons. |
| III: | The occipital lobe is associated with processing visual information. |
| IV: | The temporal lobe is involved in processing auditory information. |
| V: | The spinal cord is responsible for voluntary actions. |