Generally, epithelial cells serve the function of protection of the inner layers of the structure they are on. The fact that these columbar epithelium and transitional epithelium cells have smooth walls and are dome shaped allows them to stretch. This stretching helps the bladder retain more urine than it would be able to if the epithelial cells were rigid.
<h2><u><em>Upon reinfection, the memory cells will immediately differentiate into plasma cells and CTLs without input from APCs or TH cells.</em></u></h2>
Explanation:
<h3>Hope i helped (<em>Tell me the results in the comments below pls</em>) Good Luck!</h3>