What causes an EPSP?
A) the deactivation of cytoplasmic enzymes
B) the opening of sodium channels
C) the opening of potassium channels
D) inherited paranormal psychic abilities

Question

Quizplus · Accepted Answer

An EPSP (excitatory postsynaptic potential) is caused by the opening of sodium channels, which allows positively charged sodium ions to flow into the postsynaptic cell, depolarizing it and making it more likely to fire an action potential.

Answer: D 
 Inherited paranormal psychic abilities are not a known cause of EPSPs in the nervous system.

What Causes an EPSP