Which hormone follows a circadian rhythm and peaks just before a person wakes from sleep?

Question

Quizplus · Accepted Answer

Cortisol follows a circadian rhythm and peaks just before a person wakes from sleep. It is also known as the "stress hormone" as it is released in response to stress and helps the body respond to it. Melatonin, on the other hand, is a hormone that regulates sleep-wake cycles and is highest at night. Growth hormone and prolactin also have their own unique rhythms but are not specifically associated with waking from sleep.

Which Hormone Follows a Circadian Rhythm and Peaks Just Before