Which intestinal cell type is responsible for hormone secretion along the epithelium and is difficult to identify with standard H&E?

Which intestinal cell type is responsible for hormone secretion along the epithelium and is difficult to identify with standard H&E?

• A. Enteroendocrine cells; hormone secretion along the epithelium and are difficult to identify with standard H&E.
• B. Goblet cells secrete mucus along the epithelium.
• C. Enterocytes; absorptive cells along the epithelium.
• D. M cells; antigen transport in Peyer's patches.

Answer: (A)

Enteroendocrine cells are the hormone-secreting cells scattered within the intestinal epithelium. They form part of the diffuse neuroendocrine system and release hormones like serotonin, secretin, and cholecystokinin to regulate digestion as the chyme passes along the gut. They’re difficult to spot on standard H&E because they are relatively rare and have small, inconspicuous cytoplasm; their secretory granules don’t stain distinctly with routine stains, so they blend in with neighboring enterocytes. Special staining or immunohistochemistry for hormones or for markers like chromogranin A or synaptophysin makes them visible. In contrast, goblet cells produce mucus, enterocytes are absorptive, and M cells specialize in antigen transport in Peyer’s patches, none of which are primarily about hormone secretion along the epithelium.

Enteroendocrine cells are the hormone-secreting cells scattered within the intestinal epithelium. They form part of the diffuse neuroendocrine system and release hormones like serotonin, secretin, and cholecystokinin to regulate digestion as the chyme passes along the gut. They’re difficult to spot on standard H&E because they are relatively rare and have small, inconspicuous cytoplasm; their secretory granules don’t stain distinctly with routine stains, so they blend in with neighboring enterocytes. Special staining or immunohistochemistry for hormones or for markers like chromogranin A or synaptophysin makes them visible. In contrast, goblet cells produce mucus, enterocytes are absorptive, and M cells specialize in antigen transport in Peyer’s patches, none of which are primarily about hormone secretion along the epithelium.