The tips of neuronal axons communicate with other nerve cells by releasing small

Question

The tips of neuronal axons communicate with other nerve cells by releasing small molecules called neurotransmitters. These neurotransmitters need to cross a very tiny pocket of fluid to reach the next neuron; the distance is about 0.001 times the length of the smallest axon in this lab. Could this happen through diffusion? Yes, because the neurotransmitters will want to reach their target neuron on the other side of the fluid pocket. Yes, because the neurotransmitters are at high concentration near the diffusing axon and at low concentration next to the receiving neuron. No, because diffusing any distance takes a very long time, and neural communication has to happen rapidly. No, because diffusion does not work within very small spaces, only in large areas where there is room for the molecules to move.

Explanation / Answer

Yes, because the neurotransmitters are at high concentration near the diffusing axon and at low concentration next to the receiving neuron.

Released neurotransmitters diffuse into the synaptic clef and bind to receptors on the postsynaptic cell and initiate action potential

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