Which of the following best describes a communication barrier in the nervous system?

• A. A process by which neurons generate action potentials
• B. A neurotransmitter that enhances synaptic transmission
• C. A factor that disrupts or impedes the transmission of signals between neurons
• D. A structure that supports the physical connection between two neurons

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the concept of communication barriers in the nervous system. These barriers refer to anything that disrupts or impedes the transmission of signals between neurons.
2. Step 2: Review the options given and identify which one aligns with the idea of a barrier. For example, generating action potentials and neurotransmitters enhancing transmission are processes that facilitate communication, not barriers.
3. Step 3: Recognize that a structure supporting physical connection between neurons (like synapses) aids communication rather than blocking it.
4. Step 4: Focus on the option that describes a factor disrupting or impeding signal transmission, as this directly fits the definition of a communication barrier.
5. Step 5: Conclude that the best description of a communication barrier in the nervous system is 'a factor that disrupts or impedes the transmission of signals between neurons.'