第九章Which is not the correct description of cerebral cortex?
It consists of four lobes
It is the inner layer of the cerebrum
It is greatly enlarged in human brains
答案:It is the inner layer of the cerebrum
The neurons in cerebrum are connected by trillions of connections, or _________.
synapses
axolemma
axoplasm The cerebrum contains about 86 billion nerve cells (neurons) – the ______.
gray matter
black matter
green matter The cerebrum makes up _____ percent of the brain’s weight.
90%
95%
85% The human brain makes up about ____ percent of a human’s body weight.
4%
1%
3%
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