While the human brain makes up only _____ of the bodys weight, it requires about _____ of the bodys resources when at rest.
a. .75; 8
b. 2; 15
c. 4; 25
d. 7; 30
Question 2
Why is it thought that advances such as agriculture, literacy, and urbanization have not been accompanied by additional increases in brain size?
a. The earliest Homo sapiens were as intelligent as contemporary humans.
b. Although brain size has remained constant, brain density has increased.
c. The physiological cost of a bigger brain exceeds its benefit.
d. More efficient neuronal connections account for modern human advancements.
Brain cells of a laboratory mouse are shown glowing with multicolor fluorescent proteins
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a) Shift your weight at the end of your reach. b) Avoid overreaching.
The distribution of cones and rods over the human retina. The figure illustrates the number of cones ...
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