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.
Information from one neuron flows to another neuron across a synapse. The synapse contains a small gap separating neurons. The synapse consists of: 1  a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles.