4) The human brain is composed of _________
of pulsating neurons.
The answer is d) billions.
Small, but mighty is the human brain.
Though commonly considered to be used to only 1/10 of its potential,
the brain crowns the bodies with a mass of interconnecting neurons
which allow it to govern the body's abilities
to sense, communicate, move and maintain itself.
While a person may sleep and rest,
his/her brain centers are always active and vigilant.