| 1. | Post-synaptic membrane |
| 2. | Pre-synaptic membrane |
| 3. | Myelin sheath |
| 4. | Schwann cell |
| 1. | Impulse Transmission across a chemical synapse is always faster than that across an electrical synapse. |
| 2. | The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse. |
| 3. | Electrical current can flow directly from one neuron into the other across the electrical synapse. |
| 4. | Chemical synapses use neurotransmitters. |