Question

Identify the function of the finger-like projections found in small intestine.

• A. To sweep particles across the surface with wavelike actions
• B. To decrease the amount of exposed surface
• C. To facilitate enzyme retention and dispersal
• D. To increase the surface area for absorption and secretion

Answer 1

The correct option is D

To increase the surface area for absorption and secretion

Villi are specialised for absorption in the small intestine as they have a thin wall, are one cell thick and enable a shorter diffusion path. They have a large surface area so there will be the more efficient absorption of fatty acids and glycerol into the bloodstream.