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  3. Homeostasis refers to any process, such as negative feedback, that li

Homeostasis refers to any process, such as negative feedback, that li

游客2024-01-11  55
问题            Homeostasis refers to any process, such as negative feedback, that living
       things employ to maintain stable conditions indispensable for survival, and
       which arises from balances between forces and factors mutually influencing each
Line    other. Disturbance, or departure from equilibrium is of more consequence than
(5)     negative feedback: systems cannot correct themselves without straying. A car
       and its driver, for instance, can be regarded as a homeostatic system seeking to
       keep the car moving on track. Thus, if the car skids, the driver automatically
       responds by quickly steering the wheel in the opposite direction, but such
       abrupt negative feedback usually overcorrects. Likewise, if the magnitude of
(10)    correction is commensurate with the disturbance that triggered it, the
       correction may become an impressed change in the direction opposite to that of
       the original disturbance. Each feedback is of lesser magnitude than the last, so
       that as the oscillations of the system dampen, negative feedback achieves its
       goal in both artificial and natural systems. [br] It may be inferred that to attain greater positive feedback, in the case of the skidding car, the driver should do which of the following?
选项 A、Keep turning the wheel in the original direction.
B、Turn the wheel in the opposite direction.
C、Turn the wheel in the opposite direction, then turn it back to the original direction.
D、Keep turning the wheel in the original direction, then back to the opposite direction.
E、Allow the wheel to turn freely.
答案 A
解析
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