alleryStart learning →Tight junctions in the lining of the urinary bladder serve which purpose?
AThey pass electrical signals along
BThey anchor cells to the matrix
CThey let ions move between cells
DThey stop urine leaking between cells
Answer & Solution
Correct answer: D. They stop urine leaking between cells
1. Tight adherence at a tight junction prevents materials from leaking between the cells.
2. Tight junctions are typically found in epithelial tissues lining internal organs and cavities.
3. In the urinary bladder they prevent urine from leaking out into the extracellular space.
4. Letting ions pass between cells is the opposite behaviour and belongs to gap junctions.
5. The purpose is to stop leakage between the cells.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.6 Connections between Cells and Cellular Activities_
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