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.
Ancient Inca Facts. The Inca Empire, also known as the Inka Empire or Incan Empire, was the largest empire in pre-Columbian America. The administrative, political, and military center of the empire was located in Cusco in modern-day Peru. The man who established the Inca Empire was Manco Capac in 1438. 2  Manco Capac declared himself Sapa Inca, divine son of the Sun. 3  He was a skilled warrior and leader who exercised absolute power. 4  Most historians agree there were thirteen emperors during the time when the Inca Empire existed.