Neural transmission across a mammalian synapse is accomplished by _____
A) the movement of sodium and potassium ions from the presynaptic neuron into the postsynaptic neuron
B) impulses traveling as electrical currents across the synapse
C) impulses causing the release of a chemical signal and its diffusion across the synapse
D) impulses ricocheting back and forth across the synapse
E) the movement of calcium ions from the presynaptic into the postsynaptic neuron
Answer: C
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