We have a cluster of cells called the suprachiasmatic nucleus that serves as the internal clock. It’s hard to say whether it’s based on the length of the day because it’s evolved over time with nothing more than a 24hour day. I think OPs question is asking the mechanism of the SCN and it would respond to different period lengths, which has yet to be discovered. If the fundamentals of the internal clock are true, it wouldn’t matter how long the day is because our internal clock is telling time no matter what.
ApoptosisPending t1_isz27yj wrote
Reply to comment by theUturn2Yz in Is our sleep pattern based off the length of the day? by ebb5
We have a cluster of cells called the suprachiasmatic nucleus that serves as the internal clock. It’s hard to say whether it’s based on the length of the day because it’s evolved over time with nothing more than a 24hour day. I think OPs question is asking the mechanism of the SCN and it would respond to different period lengths, which has yet to be discovered. If the fundamentals of the internal clock are true, it wouldn’t matter how long the day is because our internal clock is telling time no matter what.