Nissl substance is composed of what?

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Multiple Choice

Nissl substance is composed of what?

Explanation:
Nissl substance in neurons is clusters of rough endoplasmic reticulum studded with ribosomes. These RNA-rich ribosomes give the cytoplasm a basophilic stain with Nissl staining, producing the characteristic Nissl bodies in the cell body and proximal dendrites. This makes rough endoplasmic reticulum the correct component, since it’s the organelle responsible for synthesizing proteins needed for neuronal maintenance, growth, and function. Mitochondria, while essential for energy production, do not form the dense basophilic Nissl bodies. The Golgi apparatus handles protein modification and sorting rather than forming these ribosome-rich clusters. The nucleus contains the cell’s DNA and appears differently from the cytoplasmic granules highlighted by Nissl stain.

Nissl substance in neurons is clusters of rough endoplasmic reticulum studded with ribosomes. These RNA-rich ribosomes give the cytoplasm a basophilic stain with Nissl staining, producing the characteristic Nissl bodies in the cell body and proximal dendrites. This makes rough endoplasmic reticulum the correct component, since it’s the organelle responsible for synthesizing proteins needed for neuronal maintenance, growth, and function.

Mitochondria, while essential for energy production, do not form the dense basophilic Nissl bodies. The Golgi apparatus handles protein modification and sorting rather than forming these ribosome-rich clusters. The nucleus contains the cell’s DNA and appears differently from the cytoplasmic granules highlighted by Nissl stain.

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