In Alaska, the longest day of summer is over 20 hours. Predict how this would affect melatonin secretion.
A) Melatonin secretion would decrease due to the extended length of time an individual is exposed to sunlight.
B) Melatonin secretion would increase due to the extended length of time an individual is exposed to sunlight.

Question

Quizplus · Accepted Answer

Melatonin secretion is influenced by light exposure. During long summer days in Alaska, the extended daylight suppresses melatonin production, leading to decreased secretion of this sleep-inducing hormone.

In Alaska, the Longest Day of Summer Is Over 20