Question

Which of the following tissue protects bladder when it is filled with urine?

• A. Columnar
• B. Cuboidal
• C. Transitional
• D. None of the above

Answer 1

Answer: (C)

Transitional

• Transitional epithelium possesses the capacity to protect bladder when it is filled with urine.
  
• Most epithelia tear when they are stretched or deformed much, but if the transitional epithelium of the bladder is stretched slowly (as it fills with fluid), tiny membrane vesicles inside of epithelial cells can fuse with the cell membrane, allowing the cell surface area to expand.
• Thus, the bladder is able to increase considerably in volume to hold urine until a convenient time to release it.
  

So, the correct option is 'Transitional'.