Rhodopsin is a light-sensitive receptor located in rod cells that announce the arrival of light.

True.

Rhodopsin is a receptor usually found in the visual system of the eyes. These receptors form the physiological pigment that detects light that passes thru the lens and then the retina and the rods which transduces light into meaningful information. 

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.