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.