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.
The Secondary Zone timeline is 16 months in service and four months as an E4, with the promotion taking place no earlier than at 18 months in service and six months in rank. Pay As of 2013, a Sergeant with the minimum Primary Zone length of time in military service earns $2416 a month, according to My Army Benefits.