Gap junctions vs. tight junctions vs. desmosomes
Which cell junction lets ions and small molecules pass directly between adjacent cells?
Answer D: explanation for every choice
A
Tight junctions seal the space between cells, blocking paracellular movement.
B
Desmosomes anchor cells together through intermediate filaments.
C
Hemidesmosomes anchor cells to the basement membrane.
D
Correct. Gap junctions form channels that link the cytoplasm of neighboring cells, as in cardiac muscle.
TakeawayGap: communicate. Tight: seal. Desmosome: anchor.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb78.