About what percentage of people over age 80 are afflicted with dementia?
a. 1
b. 10
c. 20
d. 30
C
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Children do not experience complex emotions until they are about 18 months old
a. True b. False Indicate whether the statement is true or false
The difference threshold for light is defined as the
a. weakest amount of light the average person can perceive most of the time. b. ratio of the amplitude and wavelength. c. difference in wavelengths between analogous hues. d. smallest difference in intensity required to perceive a difference in intensity 50% of the time.
A degenerative disease which is an untreatable neurological disorder involving severe, progressive memory loss is called ______
a. Milner's syndrome c. Alzheimer's disease b. retrograde amnesia d. Korsakoff's syndrome
From an evolutionary perspective, which of the following is true of sleep?
A. Sleep plays a minor role in brain plasticity. B. Sleep hinders the consolidation of memories. C. Synaptic connections between neurons decrease during sleep. D. Sleep is essential to clearing out waste in neural tissues.