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.
The synapse is a specialized structure that allows one neuron to communicate with another neuron or a muscle cell. There are billions of nerve cells in the brain and each nerve cell can make and receive up to 10,000 synaptic connections with other nerve cells. Also, the strength of the synapse is modifiable.