The events below describe neurotransmitter molecules at a synapse. 1. They attach to receptor proteins. 2. They move by diffusion across the synaptic gap. 3. They are released into the synaptic gap. 4. They are discharged from vesicles. What sequence of events takes place when an impulse reaches the synapse?
- A3 → 2 → 1 → 4
- B4 → 3 → 1 → 2
- C3 → 4 → 1 → 2
- D4 → 3 → 2 → 1