Digital Marketing is the pratice of promoting products and services using database-driven online distribution channels to reach consumers in a timely, relevant, personal and cost-effective manner. Broadband Internet, WiFi and phone Web access are also spurring growth worldwide.
The plasma membrane is an outer boundary and functional traffic-cop of every biological cell. Just like the outer layers of multicellular organisms, its primary function is to contain, protect and provide unit structure.
In all cellular organisms, the plasma membrane is the outermost layer of a cell. It serves to separate the cell from the external environment. In prokaryotes, it is the only membrane. Eukaryotes have membrane-bound organelles. In all cases of membranes they are made of the same basic phospholipid bilayer.