The trichromatic theory explains ________
a. the first level of color processing, which occurs in the retina.
b. the second level of color processing, which occurs in the ganglion cells.
c. the third level of color processing, which occurs in the thalamus.
d. the fourth level of color processing, which occurs in the visual cortex.
Answer: a
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Todd is having difficulty at work and has failed to please his boss on each of the last three projects he has been assigned. He begins to feel as if there is nothing he can do to turn things around. Soon, he starts to feel there is also nothing he can do about some of the difficulties he has been having with members of his family. He starts to act withdrawn and unmotivated most of the time. Todd
seems to be suffering from A. anxiety. B. low self esteem. C. low achievement motivation. D. learned helplessness.
The protein molecule embedded in the membrane of a postsynaptic neuron that allows the
neuron to be excited or inhibited by presynaptic neurons is called a(n) a. neuromodulator. b. neurotransmitter. c. ion transporter. d. neurotransmitter receptor. e. synaptic cleft.
Positive symptoms of schizophrenia include which of the following?
A. lack of emotion/affect B. absence of pleasure C. speech poverty D. delusions