When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This readjustment does not immediately affect the color seen but usually does affect the next area to which the gaze is shifted. The longer the time of viewing, the higher the intensity, and the larger the area, the greater the effect will be in terms of its persistence in the succeeding viewing situation. As indicated by the work of Wright and Schouten, it appears that, at least for a first approximation, full adaptation takes place over a very brief time if the adapting source is moderately bright and the eye has been in relative darkness just previously. As the stimulus is allowed to act, however, the effect becomes more persistent in the sense that it takes the eye longer to regain its sensitivity to lower intensities. The net result is that, if the eye is so exposed and then the gaze is transferred to an area of lower intensity, the loss of sensitivity produced by the first area will still be present and appear as an "afterimage" superimposed on the second. The effect not only is present over the actual area causing the "local adaptation" but also spreads with decreasing strength to adjoining areas of the eye to produce "lateral adaptation." Also, because of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become uniform. over the whole eye.
This selection is concerned primarily with ______.
A.the adaptation of the eye to color
B.the color of colors
C.the properties of colored surfaces
D.the effect of changes in color intensity
第1题
说明抗休克治疗时液体已补足的是
A.尿量少,CVP很高
B.尿量少,CVP较低
C.尿量多,CVP很低
D.尿量多,CVP正常
E.尿量多,CVP偏高
第2题
说明抗休克治疗时液体已补足的是:
A. 尿量少,CVP很高
B. 尿量少,CVP较低
C. 尿量多,CVP很低
D. 尿量多,CVP正常
E. 尿量多,CVP偏高
第3题
说明抗休克治疗时液体己补足的是
A.尿量少,CVP很高
B.尿量少.CVP较低
C.尿鲎多.CVP很低
D.尿量多.CVP正常
E.尿量多,CVP偏高
第4题
说明抗休克治疗时血容量仍不足的是:
A. 尿量少,CVP很高
B. 尿量少,CVP较低
C. 尿量多,CVP很低
D. 尿量多,CVP正常
E. 尿量多,CVP偏高
第5题
说明抗休克治疗时血容量仍不足的是
A.尿量少,CVP很高
B.尿量少,CVP较低
C.尿量多,CVP很低
D.尿量多,CVP正常
E.尿量多,CVP偏高
第6题
说明抗体克治疗时血容量仍不足的是
A.尿量少,CVP很高
B.尿量少.CVP较低
C.尿鲎多.CVP很低
D.尿量多.CVP正常
E.尿量多,CVP偏高
第7题
说明液体已补足()
A.CVP很低,尿量多
B.CVP偏低,尿量少
C.CVP偏低,尿量多
D.CVP偏高,尿量多
E.CVP很高,尿量少
第8题
提示液体量已经补足的是
A.中心静脉压低,尿量少
B.中心静脉压低,尿量多
C.中心静脉压很低,尿量多
D.中心静脉压高,尿量多
E.中心静脉压很高,尿量少
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!