In a staining assessment, which cell type is correctly stained by a colloidal iron stain that highlights mucins?

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Multiple Choice

In a staining assessment, which cell type is correctly stained by a colloidal iron stain that highlights mucins?

Explanation:
Colloidal iron stain targets acidic mucins, which are mucopolysaccharides produced by goblet cells in mucosal epithelium. Goblet cells synthesize and secrete mucin into the lumen, so their apical cytoplasm becomes rich in mucin and takes up the stain, appearing positive. The other cell types—hepatocytes, neurons, and fibroblasts—do not contain mucins in their cytoplasm, so they do not show this mucin-specific staining.

Colloidal iron stain targets acidic mucins, which are mucopolysaccharides produced by goblet cells in mucosal epithelium. Goblet cells synthesize and secrete mucin into the lumen, so their apical cytoplasm becomes rich in mucin and takes up the stain, appearing positive. The other cell types—hepatocytes, neurons, and fibroblasts—do not contain mucins in their cytoplasm, so they do not show this mucin-specific staining.

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