This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Renshaw cells are inhibitory interneurons found in: \nSelect and explain. \nA. Gray matter of brain, B. White matter of brain, C. Gray matter of the spinal cord, D. White matter of spinal cord', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Renshaw cells are inhibitory interneurons found in the gray matter of the spinal cord. They receive axonal collaterals from nearby motor neurons; it inhibits the activity of the same or related adjacent motor neurons. This recurrent inhibition by the Renshaw cell facilitates and sharpens the activity of the projecting motor neuron from which it receives the collaterals.', 'role': 'assistant'}]