CAMRT Radiography Practice Exam

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What are the folds in the stomach called?

Rugae
Cilia
Microvilli
Plicae

The correct answer is: Rugae

The folds in the stomach are known as rugae. These folds are essential for facilitating the expansion of the stomach as it fills with food. Rugae provide a larger surface area for the stomach to accommodate a significant volume of ingested substances, enabling effective mixing and digestion. As the stomach fills, these folds flatten out, allowing for greater capacity without over-distension. The other terms listed refer to different structures in the body. Cilia are hair-like projections on cell surfaces involved in movement or sensation. Microvilli are microscopic cellular membrane protrusions that increase surface area for absorption, primarily found in the intestines. Plicae are permanent folds in the intestinal lining meant to increase the surface area for absorption, but they are not found in the stomach. Understanding these distinctions helps clarify the unique role that rugae play in gastric function.