This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Anatomy
[{'content': "Nissl's (substance) bodies are seen in \nSelect and explain. \nA. Cell body, B. Axon, C. Dendrites, D. Sheath", 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Cell body # Nissl body (or Nissl granule or Tigroid body) is a large granular body found in nerve cells. It was named after Franz Nissl, German neurologist (1860-1919).> Nissl bodies can be demonstrated by selective staining, which was developed by Nissl and was an aniline stain used to label extranuclear RNA granules.> These granules are rough endoplasmic reticulum (with ribosomes) and are the site of protein synthesis.> Nissl bodies show changes under various physiological conditions and in pathological conditions they may dissolve and disappear (karyolysis).', 'role': 'assistant'}]