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.
Snapback Hats - The term âsnapbackâ is used when the cap can be adjusted using two plastic pieces that snap together at the back in a variety of lengths. Fitted - The term âfitted capsâ refer to baseball caps that are usually measured in 1/8â increments for an exact fitted size.