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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  67
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] Which of the following would be most analogous to the process of dampening oscillations described in the paragraph?
选项 A、During a rainstorm, water rises to the level of a sewer drain, siphoning off and thus remaining at constant level.
B、A rubber ball which bounces off the ground multiple times, than gradually comes to rest.
C、A meteor hurtles through space indefinitely, due to the laws of inertia.
D、A clothing iron is left on, then becomes so hot that it catches on fire, burning its own cord and destroying its power source.
E、A baseball pitcher knows he tends to through to the left of home plate, and then in trying to throw to the right, overcorrects.
答案 B
解析
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