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If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Enzymes affect the reactions in living cells by changing the