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.
Layers of the Ocean Mesopelagic Zone (Twilight Zone) Bathypelagic Zone (Midnight Zone) Abyssopelagic Zone (The Abyss) Hadalpelagic Zone (The Trenches) This layer is from the surface to 200 meters down.This zone is also named the sunlight zone this is because it gets the most sunlight.