**Question:** Which of the following statements is true for excitatory postsynaptic potentials (EPSP)?

A. EPSPs are generated by the release of neurotransmitters from presynaptic neurons that bind to receptors on the postsynaptic neuron, causing depolarization of the postsynaptic membrane.
B. EPSPs are always followed by inhibitory postsynaptic potentials (IPSPs), resulting in a net depolarization of the postsynaptic membrane.
C. EPSPs are generated by the release of neurotransmitters from presynaptic neurons that bind to receptors on the postsynaptic neuron, causing depolarization of the postsynaptic membrane.
D. EPSPs are not involved in the transmission of information within the central nervous system.

**Core Concept:** Excitatory Postsynaptic Potentials (EPSPs) are a type of postsynaptic potential that occurs when neurotransmitters are released from the presynaptic neuron and bind to receptors on the postsynaptic neuron, causing depolarization of the postsynaptic membrane. EPSPs are a fundamental component of the transmission of information within the central nervous system (CNS).

**Why the Correct Answer is Right:**

Correct Answer C states that EPSPs are generated by the binding of neurotransmitters to receptors on the postsynaptic neuron, leading to depolarization of the postsynaptic membrane. This accurately describes the core concept of EPSPs, which is their role in causing depolarization of the postsynaptic neuron upon neurotransmitter binding. EPSPs contribute to the overall process of information transmission in the CNS.

**Why Each Wrong Option is Incorrect:**

Option A is similar to the correct answer, but it introduces the concept of inhibitory postsynaptic potentials (IPSPs) as well. While IPSPs also occur following synapse activation, they are typically smaller in magnitude and can be balanced or overpowered by EPSPs. Option A is not as concise as the correct answer and does not highlight the essential concept of EPSPs causing depolarization.

Option B claims that EPSPs are not involved in information transmission within the CNS. However, EPSPs are a key component in the process of synaptic communication, specifically in excitatory signaling between neurons. Therefore, this statement is incorrect.

Option D is unrelated to the concept of EPSPs and focuses on the transmission of information within the CNS. EPSPs are specific to excitatory signaling and contribute to the overall transmission of information in the CNS.

**Clinical Pearl:**

Understanding EPSPs is crucial for grasping synaptic communication in the nervous system. EPSPs form the basis for the summation of multiple EPSPs, allowing for the generation of an action potential and the transmission of information between neurons. This concept is essential for grasping the complex processes occurring at synapses in the CNS.