1 (g) Second Messengers

 Second messengers are a substance that trigger communication inside the cell . This happens after the action of neurotransmitters and hormones.  Second Messengers affect our body in many different ways. One way it affects our body is that it can cause long term changes in the nervous system, manufacture and release neurotransmitter, it affects our Metabolism and it also affects our growth and development. A second messenger results in a cellular response.