How does melatonin secretion change in puberty, and what is its effect on adolescents?

How does melatonin secretion change in puberty, and what is its effect on adolescents?

• A. Melatonin shifts earlier; mood improves; sleep needs change
• B. Melatonin shifts later; affects mood and vigilance; sleep needs remain the same
• C. Melatonin shifts later; sleep needs increase
• D. Melatonin stays the same; no effect

Answer: (B)

During puberty, the body's internal clock shifts later, so melatonin is released later in the evening. That pushes teens’ bedtimes back and makes it harder to wake up early, which can affect daytime mood and how alert they feel (vigilance) across the day. Importantly, the amount of sleep adolescents need doesn’t increase; they still require roughly the same total hours of sleep, though school schedules often reduce the actual sleep they get. So the best answer reflects a later melatonin onset, effects on mood and daytime alertness, and a stable sleep-needs requirement.

During puberty, the body's internal clock shifts later, so melatonin is released later in the evening. That pushes teens’ bedtimes back and makes it harder to wake up early, which can affect daytime mood and how alert they feel (vigilance) across the day. Importantly, the amount of sleep adolescents need doesn’t increase; they still require roughly the same total hours of sleep, though school schedules often reduce the actual sleep they get. So the best answer reflects a later melatonin onset, effects on mood and daytime alertness, and a stable sleep-needs requirement.