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.
London is divided into 1-6 zones*. Central London is zone 1, zone 2 is the ring around zone 1, zone 3 is the ring around 2 and so on. If you look at the zone map below it will make sense.Itâs important to be aware of Londonâs transport zones and to find out what zone a station is in.ou can see the zone on the tube map. The zones are marked in either white or lilac. Scroll around or type in a station name in the search box to see the zone. View a large version of the tube map.