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 (sinÂ´aps) , n the region of contact between the processes of two adjacent neurons forming the place where a nervous impulse is transmitted from the axon of one neuron to the dendrites of another. It also is called the. synaptic junction.xoaxonic synapse one between the axon of one neuron and the axon of another neuron. axodendritic synapse one between the axon of one neuron and the dendrites of another. axodendrosomatic synapse one between the axon of one neuron and the dendrites and body of another.