How does the mucosa of the rectum compare with that of the colon and cecum?
a. the rectum is lined with stratified columnar epithelium, whereas the colon and cecum are lined with simple columnar epithelium
b. the colon and cecum are lined with a simple columnar epithelium for absorption, whereas the rectum is lined with stratified squamous epithelium because it is next to an opening to the exterior
c. the colon and cecum are lined with a simple cuboidal epithelium for absorption, whereas the rectum is lined with transitional epithelium to allow for expansion during defecation
d. none of the listed responses is correct; the epithelial lining is constant throughout the large intestine
Answer: b. the colon and cecum are lined with a simple columnar epithelium for absorption, whereas the rectum is lined with stratified squamous epithelium because it is next to an opening to the exterior
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