Paracellular transport

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Paracellular transport refers to the transfer of substances between cells of an epithelium.[1][2]

It is in contrast to "transcellular transport", where the substancees travel through the cell, passing through both the apical membrane and basolateral membrane.[3][4][5]

The distinction is in particular significance in renal physiology. Transcellular transport is more likely to involve energy expenditure than paracellular transport.[6]

Capillaries of Blood Brain Barrier have transcellular transport only in contrast with normal capillaries which have both - transcellular and paracellular transport. This is due to the presence of tight junctions in Blood Brain Barrier and Astrocytes that surround the capillaries.


External links

  • Essentials of Human Physiology by Thomas M. Nosek. Section 7/7ch05/7ch05p05.

de:Parazellulärer Transport