In human evolution, hominids walked on two legs, also known as __________

The most basic unit in the brain and nervous system of a human being is the a. nerve

b. astrocyte. c. glial cell. d. neuron.

Su Chuen has sudden periods of extreme sleepiness when she will collapse and enter REM. This describes:

a. sleep apnea b. insomnia c. narcolepsy d. hypermnesia