Black and white vision with the greatest sensitivity under lower levels of illumination describes the function of the
a. cones.
b. rods.
c. phosphenes.
d. visual pigments.
ANSWER: b
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Which of the following has a strong link to Alzheimer's disease?
a. Accumulation of harmful proteins in the brain b. Prolonged deficiency of vitamin B1 c. Difficulty metabolizing phenylalanine and gluten d. A low ratio of dopamine to serotonin in the brain
Sleep apnea is characterized by sleep attacks during wakefulness
a. True b. False Indicate whether the statement is true or false
You are standing in the middle of a field of long, tall grass and flowers. When you look at your feet and at the area immediately around you, you can see great detail and pick out all the individual pieces of foliage. However, when you look up in the distance, the grass and flowers lose detail and begin to merge together. This phenomenon involves the pictorial depth cue of
a. texture gradients. b. linear perspective. c. relative size. d. relative motion.
Schachter and Singer's cognitive theory states that physiological arousal:
a. causes particular emotions to be experienced b. results from the movements of facial muscles c. creates the need for an explanation d. cannot be cognitively appraised