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.
Structure of a Synapse. Neurons are cells that are excitable, or able to be stimulated electrically. This serves as the method by which these cells communicate with other cells. Electrical signals in a neuron are delivered to another cell via the axon, or transmitting structure.