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【单选题】
人体存在许多具有调整生物节律的生物活性物质，称之为生物节律分子。下列哪个属于生物节律分子?()
A.
松果体
B.
瘦素
C.
褪黑激素
D.
内皮素
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Biological ClockWhen the sun rises on a warm and sunny day, you can see some flowers open up. When they close late in the afternoon, other flowers open.Biological rhythms（生物节律）, like the opening and c...
A.
But where can you find it?
B.
This makes them feel tired.
C.
In the summer they fly back to have babies.
D.
We are learning more and more about them.
E.
Biological clocks can be adjusted.
F.
Other rhythms are based on months, seasons or years.