neurogenesis {Ans: the formation of new neurons is called}multiple sclerosis {Ans: the degeneration of the myelin sheath could cause ________}somatosensory cortex {Ans: area at the front of the parietal lobes that registers and processes body touch and movement sensations}monozygotic {Ans: twins who develop from a single fertilized egg that splits in two}action potential {Ans: a neural impulse; a brief electrical charge that travels down an axon.}amygdala {Ans: linked to emotions, specifically rage and fear}afferent {Ans: sensory neurons}heritability {Ans: the proportion of variation among individuals that we can attribute to genes.}electroencephalogram {Ans: an amplified recording of the waves of electrical activity sweeping across the brain's surface. These waves are measured by electrodes placed on the scalp}genes {Ans: the biochemical human building blocks of heredity that make up the chromosomes; segments of DNA capable of synthesizing proteins}endorphins {Ans: Morphine elevates mood and eases pain, and is most similar to what neurotransmitter}glial cells {Ans: responsible to support, nourish, and protect neurons and may also play a role in learning and thinking.}CT scan {Ans: a series of X-ray photographs taken from different angles and combined by computer into a composite representation