AP PSYCHOLOGY

Detailed explanation-1: -The cerebrum is the largest part of the brain, accounting for 85 percent of the organ’s weight. The distinctive, deeply wrinkled outer surface is the cerebral cortex. It’s the cerebrum that makes the human brain-and therefore humans-so formidable.

Detailed explanation-2: -The cerebrum makes up 85% of the brain’s weight, and the brain makes up about 2% of a human’s body weight. The texture of the brain is like a firm jelly. The heaviest normal human brain weighed 4.43 pounds.

Detailed explanation-3: -The cerebral cortex is the outer layer of the cerebral hemispheres. The cerebrum (or forebrain) makes up 75% of the brain by volume and 85% by weight. About 75% of all the brain’s neurons are located in the cerebral cortex, mainly in the grey matter.

Detailed explanation-4: -Cerebellum makes up about 85% of the brain’s weight.

Detailed explanation-5: -On the average, the cerebrum accounted for 87% of the total brain weight, the cerebellum and brain stem for 13%, whereas the contribution of the attached upper spinal cord was negligible (< 2 g). The removed leptomeninges had a mean weight of 34.2 g (2.5% of the total brain weight), but they may reach 50 g.