Circadian
Clock
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.com · SCN · clock genes · light · melatonin
clock time
06:00
gene loop
low
melatonin
off
state
—
Light to the retina
SCN pacemaker neurons
Clock-gene loop (PER/CRY)
Melatonin output
▶ Play
←
→
🔇 Unmute
Reset
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.com · Circadian Clock (SCN)