Which of the following are the only mucosal folds that do not flatten out at all when the organ stretches?
A) longitudinal folds in the esophagus
B) rugae in the stomach
C) circular folds in the small intestine
D) mucosal folds in the gallbladder

Question

Quizplus · Accepted Answer

Circular folds, also known as plicae circulares, are the only mucosal folds that do not flatten out at all when the small intestine is stretched. This is because they are permanent, structural features of the small intestine, whereas the other mucosal folds listed are more temporary and dependent on the organ's current state. Longitudinal folds in the esophagus are stretched and flattened when food passes through, while rugae in the stomach flatten out to accommodate more food. Mucosal folds in the gallbladder are not responsible for any stretching or movement, as the gallbladder is not involved in digestion.

Which of the Following Are the Only Mucosal Folds That