Structure of Mucosal Villi

Questions and Answers

What is the primary role of microvilli on the epithelial cells of the villus?

To produce digestive enzymes

To transport nutrients directly into the bloodstream

To aid in the movement of food through the intestine

To increase surface area for absorption (correct)

Which component of the villus is responsible for transporting fats into the bloodstream?

Venule

Arteriole

Capillaries

Lacteal (correct)

What structure connects the gallbladder to the common bile duct?

Pancreatic duct

Hepatic duct

Common hepatic artery

Cystic duct (correct)

What is the function of the smooth muscle layer called muscularis mucosa in the villus?

To support the villus structure Signup and view all the answers

What major function does the liver perform in relation to bile?

Emulsifies fats to prepare for digestion Signup and view all the answers

Where does bile travel to after being secreted by the liver?

Duodenum via common bile duct Signup and view all the answers

Which of the following correctly describes the pathway of absorbed nutrients from the villus?

Transported to the liver via the portal vein Signup and view all the answers

What is the primary purpose of the brush border on the epithelial cells in the villus?

Increases absorption surface area Signup and view all the answers

Study Notes

Structure of Mucosal Villi

Villus: Small, finger-like projections in the small intestine lining, enhancing nutrient absorption.
Epithelial cells of the villus have microvilli, significantly increasing surface area.
Contains a network of capillaries that transport absorbed nutrients into the bloodstream.
Lacteal: Lymphatic vessel within the villus, responsible for fat transport to the bloodstream.
Arterioles and venules supply blood along the villus, supporting capillary function and lacteal.
Supported by muscularis mucosa, a layer of smooth muscle providing structural integrity.

Liver and its Associated Structures

Liver: Multifunctional organ that produces bile, filters blood, and stores nutrients.
Gallbladder: Stores bile produced by the liver for fat digestion.
Cystic duct: Connects the gallbladder to the common bile duct.
Common bile duct: Transports bile to the small intestine, specifically the duodenum.
Bile's role: Aids in fat digestion by being secreted into the duodenum from the liver through the bile ducts.

Description

Explore the intricate structure of mucosal villi located in the small intestine. This quiz covers the various components of a villus, including epithelial cells, microvilli, capillaries, and lacteals, focusing on their roles in nutrient absorption.