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【单选题】
一位悲恸的父亲在等他儿子从手术室出来。该父亲在突然倒车时撞到了儿子,引起多处骨折和严重的头部损伤。他的下列哪项陈述提示他需要一名精神科顾问?()A.
“我的儿子会好的，但我可能会因莽撞驾驶而受到控诉。”
B.
“他母亲知道这事时会杀了我的。”
C.
“我没有看到他在车后面跑。”
D.
“如果他死了，我除了跟他一起死，没有其他选择。”
E.
“希望我的儿子可以好起来。”
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皮皮学刷刷变学霸
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【多选题】Why is ATP-driven Na + or H + important?
A.
In the plasma membrane of an animal cell, an ATP-driven Na + pump transports Na + out of the cell against its electrochemical gradient; this Na + can then flow back into the cell, down its electrochemical gradient, through various Na + gradient-driven pumps.
B.
The influx of Na + through these gradientdriven pumps provides the energy for the active transport of many other substances into the cell against their electrochemical gradients. If the ATP-driven Na + pump ceased operating, the Na + gradient would soon run down, and transport through Na + gradient-driven pumps would come to a halt.
C.
For this reason, the ATP-driven Na + pump has a central role in the active transport of small molecules across the plasma membrane of animal cells.
D.
Plant cells, fungi, and many bacteria use ATP-driven H + pumps in an analogous way: in pumping H + out of the cell, these proteins create an electrochemical gradient of H+ across the plasma membrane that is subsequently harnessed for solute transport.
【单选题】The various pumps and lines are _____ to some extent so that each pump can act as an alternative for another.
A.
interlocked
B.
interconnected
C.
interfered
D.
interacted
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