Neurotransmitters are chemical messengers that coordinate the transmission of signals from one nerve cell (neuron) to the next.eurotransmitters are chemical messengers that coordinate the transmission of signals from one nerve cell (neuron) to the next.
Soldiers in the secondary zone may be boarded with 16 months time-in-service and four months time-in-grade as of the first day of the board month. The time-in-service requirement for attaining eligibility for promotion to SSG is 84 months Active Federal Service for the primary zone and 48 months for the secondary zone.
Types of Erogenous Zones. 1  Primary Zones. In a woman, the primary erogenous zones are her clitoris and vagina, and the standard definition of this zone is simply any organ that releases an orgasm when it is stimulated. Usually a womanâs vagina produces* an orgasm when her G spot is stimulated, and the clitoris can be aroused by touching or other types of circular motions.