Neurotransmitters are the first to be discovered. Which is secreted by nerve endings, with choline by the liver as a precursor to the synthetic . Created nerve (acetylene). To absorb choline Saito into the cytoplasm by energy carrier. To join the acid coenzyme A. Urbina. The enzyme (choline acetyltransferase). The acid accumulation in Castile choline (vesicle) at the end (Axon). When the nerve impulse reaches the nerve will allow calcium ions (Ca ++) into the nerve endings. To help draw (vesicle), touch membrane secretes acid choline Castile thousands of molecules through a gap City Synapse. To act against (receptor) on the cell membrane of the next cell. (Cells after City Synapse).