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connects brain to the spinal chord; controls information going in and out of the brain; controls involuntary actions
class of hormones that cannot pass through the cell membrane; less likely to be stored in the body
class of hormones that can pass through the cell membrane; can be stored in the body
type of neurons that usually has long dendrites and short axons, and carry messages from the body to the CNS
usually has long axons and short dendrites, and transmits messages from the central nervous system to the body
sodium potassium pump
maintains unequal concentration by actively transporting ions against concentration gradients
makes membrane more permeable to sodium and increases synaptic transmission of impulses in brain (eg. caffeine, cocaine, mescaline, nicotine)
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