The signal transduction pathway is the mechanism by which the energy of a photon signals a mechanism in the cell that leads to its electrical polarization. 1  This polarization ultimately leads to either the transmittance or inhibition of a neural signal that will be fed to the brain via the optic nerve.
The Inland Empire (I.E.) is a metropolitan area and region of Southern California. It is situated directly east of the Los Angeles metropolitan area.
Overview of the Inca Empire. The Inca Empire was the largest prehispanic society of South America when it was 'discovered' by the Spanish conquistadors led by Francisco Pizarro in the 16th century AD. At its height, the Inca empire controlled all of the western part of the South American continent between Ecuador and Chile.