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MCAT Question A Day - 6/7/14

Novocain is a local anesthetic used by many dentists. Novocain most likely inhibits the action potential of a neuron by:

A.  stimulating calcium voltage gated channels at the synapse.
B.  increasing chloride ion efflux during an action potential.
C.  uncoiling Schwann cells wrapped around an axon.
D.  blocking sodium voltage gated channels.

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