0 used to describe the processes in animals and plants that happen naturally during a 24-hour period: --
Little is known about how circadian clocks and photoreceptors communicate to regulate shedding.
Limulus photoreceptors do not contain an endogenous circadian oscillator, but rely upon efferent outflow from a central clock for circadian timing.
Rather, light acts indirectly by modulating the output of the circadian clock.
Such a mechanism provides an alternative to one involving circadian control of retinal responses.
However, evidence for circadian control of dopamine synthesis and release is still controversial.
Effects of exogenous melatonin on circadian disc shedding in the albino rat retina.
Phototransduction by retinal ganglion cells that set the circadian clock.
Circadian clocks located in the photoreceptors and retinal neurons regulate melatonin synthesis in the eye.
