Module 1: Figure cell communication

Cell communication through electrical and chemical signalling mechanisms.

Cells that are connected through the low-resistance gap junctions (shown on the left) can communicate rapidly with each other by passing electrical current or through the diffusion of low-molecular-mass second messengers such as cyclic AMP and inositol 1,4,5-trisphosphate (InsP3). In the case of chemical communication (shown on the right), one cell releases a stimulus, which diffuses to a target cell that has receptors to detect the stimulus and to relay information along various cell signalling pathways to activate effectors either in the nucleus (Enucl) or cytoplasm (Ecyto).