Podcast
Questions and Answers
What is the primary role of microvilli on the epithelial cells of the villus?
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?
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?
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?
What is the function of the smooth muscle layer called muscularis mucosa in the villus?
What major function does the liver perform in relation to bile?
What major function does the liver perform in relation to bile?
Where does bile travel to after being secreted by the liver?
Where does bile travel to after being secreted by the liver?
Which of the following correctly describes the pathway of absorbed nutrients from the villus?
Which of the following correctly describes the pathway of absorbed nutrients from the villus?
What is the primary purpose of the brush border on the epithelial cells in the villus?
What is the primary purpose of the brush border on the epithelial cells in the villus?
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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.
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