When Two Action Potentials Arrive Simultaneously at Two Different Presynaptic

question 54

Multiple Choice

When two action potentials arrive simultaneously at two different presynaptic terminals that synapse with the same postsynaptic neuron,

• A) the direction of the action potential is reversed.
• B) temporal summation occurs.
• C) spatial summation occurs.
• D) hyperpolarization occurs.
• E) threshold is never reached.