Synaptic Transmission. In a chemical synapse, the pre and post synaptic membranes are separated by a synaptic cleft, a fluid filled space. The chemical event is involved in the transmission of the impulse via release, diffusion, receptor binding of neurotransmitter molecules and unidirectional communication between neurons. The neurotransmitter termination can occur in three ways - reuptake, enzymatic degradation in the cleft and diffusion.
Pride in Accomplishment: The Interstate H-3 Project. Hawaii, America's 50th state, is known around the world for gentle trade winds and tropical beauty. While Hawaii takes pride in these natural wonders, we are also proud of our human achievements. One truly spectacular accomplishment is the completion of the Interstate H-3 freeway on the island of Oahu. H-3, 37 years in the making, was officially opened on Dec.12, 1997.
For the deepest tunnel in the world in general go here -. Eiksund Tunnel-The deepest tunnel in the World. Seikan tunnel is nearly ' 53.85 kilometer long ' with a 23.3 kilometer section under the sea-bed which has been continuously welded.The track is 460 ft(140 meters) below the seabed and total depth from sea level to the tracks is 240 meters (790 ft) .inally with all those brutal conditions, the Seikan tunnel was opened on 13 March 1988 and the cost of construction reached 3.6 billion Dollars. Seikan Tunnel holds the record for Deepest operational Railway Tunnel in the World and also as the longest Tunnel in the World. : Deepest Cave in the World (2kms Deep).