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
Nissl's (substance) bodies are seen in 
Select and explain. 
A. Cell body, B. Axon, C. Dendrites, D. Sheath
A: Cell body
Answer: A: Cell body 
Explanation: (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).