The diagram represents the functional unit of a nervous system. which structure secretes a neurotransmitter

The structure that secretes the neurotransmitter is the synapse. The synapse is where these neurotransmitters are located. Neurotransmitters are organic chemicals formulated by the nerve cells which enables and triggers some behavioral and cognitive, even emotional dispositions. These are activated according to specific function.  

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.