No, not really. It is difficult to measure because the tissue is delicate and the scale is very, very small. You can look at my citation manager for some educa

No, not really. It is difficult to measure because the tissue is delicate and the scale is very, very small. You can look at my citation manager for some educational resources on the topic however https://www.zotero.org/i_o/collections/C2QRMIZE https://www.zotero.org/i_o/collections/C2QRMIZE But I would mostly recommend a neuroscience textbook. The following link is to the entry discussing what a neurotransmitter is so I think you'll find it immediately interesting https://www.ncbi.nlm.nih.gov/books/NBK10957/ https://www.ncbi.nlm.nih.gov/books/NBK10957/ In general neurotransmitters trigger a response in the target neuron by interacting with a channel embedded in the cell wall. This can trigger a change in the target cell if the triggered channel causes a protein to be released, or it can be an input signal used by the target to determine whether or not it should fire and pass a signal (through the medium of neurotransmitters) on to the neurons it itself targets. If you are interested in the topic I strongly recommend creating a personal glossary for yourself. That textbook I linked has one I believe, and that ncbi domain has many other useful resources. There is a lot of simple sentences whose meaning is obscured purely because of a deficit of vocabulary, once you get some definitions down then a lot of medical texts really open up.