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.
1. synapse-the junction between two neurons (axon-to-dendrite) or between a neuron and a muscle; nerve impulses cross a synapse through the action of neurotransmitters.myoneural junction, neuromuscular junction-the junction between a nerve fiber and the muscle it supplies.. synapse-the junction between two neurons (axon-to-dendrite) or between a neuron and a muscle; nerve impulses cross a synapse through the action of neurotransmitters.