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【单选题】
胃肠平滑肌的基本电节律( )
A.
起源于肌肉本身
B.
受中枢神经系统和体液因素的调节
C.
两者均有
D.
两者均无
E.
没有自身节律性
参考答案：
参考解析：
刷刷题刷刷变学霸
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【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.