Question

in a human, the intestines need to form a barrier to prevent bacteria and other microbes from moving into the bloodstream from the gut. what type of cell junction will prevent bacteria from moving between intestinal cells?

• gap junction
• plasmodesmata
• anchoring junction
• cell wall
• tight junction

Explanation:

• Gap junctions allow small molecule passage between cells, not a barrier.
• Plasmodesmata are plant cell connections, not human.
• Anchoring junctions hold cells together but don't block gaps.
• Cell walls are not present in human intestinal cells.
• Tight junctions fuse adjacent cell membranes, creating an impermeable barrier that stops microbes from moving between intestinal cells into the bloodstream.

Answer:

tight junction