Excitatory EPSP takes place if the reversal potential is more positive than threshold.Group of answer choicesTrueFalse

Answer Explanation

The statement, "Excitatory EPSP takes place if the reversal potential is more positive than threshold," is indicative of the relationship between the reversal potential of excitatory postsynaptic potentials (EPSPs) and the action potential threshold.

1. Understanding EPSP: An excitatory postsynaptic potential (EPSP) is generated when neurotransmitters bind to receptors on the postsynaptic neuron, leading to depolarization.

2. Reversal Potential: The reversal potential for EPSP is the membrane potential at which the flow of ions (usually Na⁺ or Ca²⁺) through the channels becomes null; that is, when the inward ionic current equals the outward ionic current.

3. Threshold for Action Potential: The threshold is the membrane potential that must be reached for an action potential to occur.

In general:

• If the reversal potential is more positive than the threshold, this means that the influx of positively charged ions would be greater, contributing to an EPSP, thus making it more likely to reach the threshold and fire an action potential.

Final Answer

True: EPSP occurs if the reversal potential is more positive than the threshold.