This Research Topic is aimed towards collecting the present knowledge of structure and function of sensory receptors in the animal kingdom, as well as the mechanisms of signal transduction and downstream signal amplification. The term sensory receptor applies for sensory modalities reflecting the outer world (vision, audition, olfaction etc.), the inner world (pH, osmolarity, glucose level etc.) or both such as temperature and pain.

Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.