Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 5)

What can be said about serotonin? A. It is a chemical that increases the appetite B. Only certain people produce it in their brains C. It tells the brain when a person is full D. It neur

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What can be said about serotonin?

It is a chemical that increases the appetite

Only certain people produce it in their brains

It tells the brain when a person is full

It neurotransmits carbohydrates to the brain

Giải thích

Chọn đáp án C