Describe how nerve cells send signals?

When neurons communicate, the neurotransmitters from one neuron are released, cross the synapse, and attach themselves to special molecules in the next neuron called receptors. Receptors receive and process the message, then send it on to the next neuron. 4. Eventually, the message reaches the brain.

Explanation:

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on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

a compound light microscope is used to magnify objects in steps.  

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