Mass marketing is a market strategy in which a firm decides to ignore market segment differences and appeal the whole market with one offer or one strategy,[1] which supports the idea of broadcasting a message that will reach the largest number of people possible.

Spanish dictionary online

The sheath acts as an insulator - rather like the plastic coating of an electrical wire. Neurones are adapted to their function by being long, so that they communicate with distant parts of the body. They also have branched endings called dendrites.