Which hormone is responsible for regulating sleep-wake cycles?

Which hormone is responsible for regulating sleep-wake cycles?

  • Melatonin
  • Cortisol
  • Insulin
  • Thyroxine
The correct option is: Melatonin
Melatonin is the hormone responsible for regulating sleep-wake cycles, produced by the pineal gland.
Tags: melatoninsleeppineal gland