5 Questions
What is a function of the epithelium lining in the digestive tract?
Provide a selectively permeable barrier between the contents of the tract and the tissues of the body.
What is one of the functions of the lymphoid nodules in the lamina propria and submucosal layer?
Protect the organism from bacterial invasion.
What is produced by the macrophages and lymphoid cells in the lamina propria?
IgA
What is the function of mucus production by the epithelium lining?
To provide lubrication and protection.
In which tracts is IgA present?
All of the above
Study Notes
Epithelium Lining Functions
- Provides a selectively permeable barrier between the contents of the tract and the tissues of the body.
- Facilitates the transport and digestion of food.
- Promotes absorption of the products of digestion.
- Produces hormones that affect the activity of the digestive system.
- Produces mucus for lubrication and protection.
Defense Mechanisms
- Lamina propria and submucosal layer contain abundant lymphoid nodules that protect the organism from bacterial invasion.
- Lamina propria is rich in macrophages and lymphoid cells that produce IgA.
- IgA is present in the respiratory, digestive, and urinary tracts.
This quiz covers the different functions of the epithelial lining in the digestive system, including its role in digestion, absorption, and protection.
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