UNIT CELL PROCESSES Concept of a“ Control volume” around a cell Soluble Regulator Cell Matrix Product+ Soluble (Regulator) Regulator b “ Control volume”UNIT CELL PROCESSES UNIT CELL PROCESSES Concept of a “Control Volume” around a Cell Concept of a “Control Volume” around a Cell Cell + Matrix Cell + Matrix Product + Soluble Product + Soluble (Regulator) (Regulator) Regulator B Regulator B “Control Volume” “Control Volume” Soluble Soluble Regulator Regulator A