You didn't really provide any possible answers here. However, it's very easy to say that the responsible actors for impulse transmission across the synapses from one nervous cell to another nervous cell is what we call neurotransmitters. These are special molecules that can have different effects when binding onto the required receptor sites.
Answer:
The act of observing or making an observation.
Explanation:
It cause a chain reaction and kills off the organisms
Hello there!
Adult skin cells can no longer become other types of cells because tthey have already undergone ____________
differentiation
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