The lens of the human eye changes shape whenever

A. the rods are dilated
B. the cones are contracted
C. the retina is activated
D. the ciliary muscle is contracted
E. the photoceptors are dilated


D

Psychology

You might also like to view...

Research suggests that, in general, prejudiced people and non-prejudiced people differ from one another in terms of ____

a. their automatic responses to other groups b. their conscious responses to other groups c. both their automatic responses to other groups and their conscious responses to other groups d. neither their automatic responses to other groups nor their conscious responses to other groups

Psychology

An early test of Lewin's tension theory was done by Zeigarnik who discovered that humans ____.?

a. ?suffer depression when they experience constant failures b. ?better remember an unusual item in a series of items c. ?tend to remember unfinished tasks better than finished ones d. ?use phenomenology when the introspect e. ?sometimes show less insight than do apes

Psychology

John Watson advocated that the goal of scientific research should be to:

a. discover how unconscious impulses controlled behavior b. uncover the basic elements that made-up the mind c. show how changes in the environment lead to changes in behavior d. demonstrate that conscious experience was more than the sum of its parts

Psychology

Bias in survey research can come from

a. The subject's reported level of pain b. The general context of the survey c. The reliability of the study d. The validity of the study

Psychology