Contraction of the ________ Alters the Surface Area by Moving

Question

Contraction of the ________ alters the surface area by moving villi.
A) mucosa
B) submucosa
C) submucosal plexus
D) muscularis mucosae
E) adventitia

Accepted Answer

The muscularis mucosae is a thin layer of smooth muscle located in the mucosa layer of the digestive tract. Contraction of this layer can alter the surface area by moving the villi, which increases the efficiency of nutrient absorption. A, B, C, and E are not directly involved in altering surface area through movement of villi.