Which is not an example of intracellular communication?




A.



Ions are exchanged in a nerve cell stimulating other ion changes in that same cell.



B.



A chemical released in a cell stimulates another part of that same cell.



C.



A chemical release in a muscle cell causes the release of a second chemical in that same cell.



D.



A pheromone molecule in the air produced by one insect stimulates a reaction in a cell of another insect.