주어진 문장이 들어갈 위치로 가장 적절한 것은?Therefore, wh… | [7급 지방직 영어] 19년 1회차 기출문제 상세 페이지

주어진 문장이 들어갈 위치로 가장 적절한 것은?
Therefore, when the days are shorter and darker, the
production of this hormone increases.
SAD (Seasonal Affective Disorder) results from a decrease
in the amount of sunlight sufferers receive. Doctors know
that decreased sunlight increases the production of melatonin,
a sleep-related hormone that is produced at increased
levels in the dark. ( ① ) Shorter, darker days also
decrease production of serotonin, a chemical that helps
transmit nerve impulses. ( ② ) Lack of serotonin is
known to be a cause of depression. ( ③ ) Depression
may result from the resulting imbalance of these two
substances in the body. ( ④ ) Also doctors believe that
a decrease in the amount of sunlight the body receives
may cause a disturbance in the body’s natural clock.
Doctors believe that the combination of chemical imbalance
and biological clock disturbance results in symptoms such
as lethargy, oversleeping, weight gain, anxiety, and
irritability―all signs of depression.

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