Examlex
Match each lettered cell in the table with the description that belongs in that cell.
-one population obtains energy; the other is damaged (usually not killed)
Psychoactive Drugs
Substances that affect the mind, mood, or other mental processes by altering the brain's chemical balance.
Neurotransmitters
Chemical substances that transmit nerve impulses across a synapse from one neuron to another.
Blood-Brain Barrier
A selective permeability barrier that protects the brain from foreign substances in the blood that may harm it.
Circadian Rhythms
Biological processes that display an endogenous, entrainable oscillation of about 24 hours.
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