As you age the following things take place in your skin: 1  The amount of collagen produced is diminished and the type of collagen changes from a more youthful type of collagen to an older type of collagen. The production of collagen never ends. 2  The Elastin in your skin decreases in content as well as production.
The definition of a synapse is the junction between two neurons or nerve cells where there is a small gap that neurotransmitters help nerve impulses to cross.
Synapse. There are chemical synapses, and  electrical synapses; chemical synapses involve  neurotransmitters diffusing across a small space between the  neurons, and electr â¦ ical synapses involve a much smaller gap called  a gap-junction, where ions move through channels resulting  in an electrical current.hen a signal reaches the end of a neuron it releases neurotransmitters into the synapse where they bind to receptors to release the second messenger into the next neuron.