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y'all ever just sit there and think I wonder why I woke up when the sun came up today. Because sometimes I wonder what tells us to wake up, like does our brain automatically know what time it is? I'm just wondering​

Respuesta :

mackishajalloh

The optic nerve in your eyes senses the morning light. Then the SCN triggers the release of cortisol and other hormones to help you wake up. But when darkness comes at night, the SCN sends messages to the pineal gland. This gland triggers the release of the chemical melatonin.

Brainliest please! :)

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