What type of electric potential increases the likelihood that the postsynaptic neuron will fire

A)  all-or-none potential 
B)  excitatory postsynaptic potential 
C)  inhibitory postsynaptic potential 
D)  a resting potential

Excitatory postsynaptic potentials (EPSPs) increase the likelihood that the postsynaptic neuron will fire by depolarizing the membrane potential. This depolarization brings the membrane potential closer to the action potential threshold, making it more likely that an action potential will be generated. All-or-none potential refers to the fact that action potentials either happen or they don't, while inhibitory postsynaptic potentials (IPSPs) decrease the likelihood of firing by hyperpolarizing the membrane potential. A resting potential is the baseline potential of a neuron when it is not actively receiving or transmitting signals.