The trichromatic theory of color vision is based on the idea that the retina contains __________
a) three classes of cells that alter their rates of firing according to color.
b) three types of rods that respond to different saturation levels.
c) rods, cones and a third type of cell called a muon that, depending upon the hue, stimulates different combinations of cones to fire.
d) three types of cones that respond maximally to one of three colors - red, green or blue.
d Explanation: This is the basic premise of Helmholtz's trichromatic theory of color vision.
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Horney believed that dreams were:
a. reliable sources of true memories. c. prospective in nature. b. nothing more than reflections of the past. d. actual attempts to resolve problems.
When persuasion researchers refer to a persuasive message as having "personal relevance" for someone, what they mean is that the ____
a. issue will have significant consequences for the person's life b. issue is generally interesting to the person c. person has at some point in life already been affected by the issue d. issue concerns people who are similar to the person—though it may or may not affect the person himself or herself
Julie's friend Lynda is undergoing chemotherapy. While Julie is visiting Lynda at the hospital, Lynda screams at Julie to "leave the room and never come back.". According to Kübler-Ross, Lynda's behavior toward Julie is part of which emotional reaction to death and dying?
a. anger b. denial and isolation c. bargaining d. depression
Channels that open when they come in contact with specific chemicals are known as a. sodium-potassium pumps
b. ligand-gated channels. c. voltage-dependent channels. d. phospholipids pumps.