Question

The cells of basal layer of transitional tissue are attached to the lamina propria through

• A. Tonofilaments
• B. Hemidesmosome
• C. Basal membrane
• D. Both A and B

Answer 1

Answer: (D)

Both A and B

• Transitional epithelium is made up of three types of cell layers: basal, intermediate, and superficial.
• The basal layer fosters the epithelial stem cells in order to provide constant renewal of the epithelium.
• The cytoplasm of these cells is rich in tonofilaments and mitochondria. The tonofilaments play a role in the attachment of the basal layer to the basement membrane via desmosomes.
  

So, the correct option is 'Both A and B'.