The surface area of the small intestine is increased for efficient absorption by the presence of:
A)cilia on the smooth muscle
B)microvilli on the smooth muscle
C)microvilli on the columnar epithelium
D)cilia on the columnar epithelium

Question

Quizplus · Accepted Answer

Microvilli are finger-like projections on the surface of the columnar epithelium cells in the small intestine, greatly increasing the surface area available for absorption. Cilia and smooth muscle do not increase surface area for absorption.

The Surface Area of the Small Intestine Is Increased for Efficient