Epithelial tissue in animals provides a barrier against the invasion of bacteria into the body. Which of the following is most likely responsible for creating a tight enough barrier to prevent the passage of bacteria?

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Quizplus · Accepted Answer

Tight junctions are cell-to-cell junctions that create a tight seal between adjacent epithelial cells, preventing the passage of molecules and bacteria between the cells. Anchoring junctions (such as desmosomes) and gap junctions allow for cell-cell communication and adhesion, but do not create a physical barrier like tight junctions. Plasmodesmata are found in plant cells, and allow for communication and transport between plant cells.

Epithelial Tissue in Animals Provides a Barrier Against the Invasion