For a Tissue or an Organ to Function as a Unit

Multiple Choice

For a tissue or an organ to function as a unit,

A) the cells within the tissue or organ must be able to depolarize to create cell signals.
B) there must be a signal molecule to which all cells in the tissue or organ can respond.
C) the tissue or organ must be composed of all of the same type of cells.
D) there must be cell- cell communication among the cells within a tissue or organ.