Unlike an electrical synapse, the chemical synapses are separated by a space called the synaptic cleft, typically measured between 15 and 25 nm. Transmission of an excitatory signal involves several steps outlined below.
Definition of cap. 1  1a : a head covering especially with a visor and no brimb : a distinctive head covering emblematic of a position or office: such as (1) : a cardinal's biretta (2) : mortarboard.
A 'Coat of Arms' (full achievement) generally refers to the shield, crest, helmet, mantling and supporters (if any), while the 'Crest' technically only refers to the small image that lies on the helm (top of the helmet). A Coat of Arms that bears a name was originally bestowed to an individual; also see Q11.