Wich structure produces chemicals that regulate the reproductive cycle?

Hormones produce chemicals that regulate the reproductive cycle for both males and females.

The moths will eventually become extinct

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.