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Fig. 19 | Fluids and Barriers of the CNS

Fig. 19

From: Fluid and ion transfer across the blood–brain and blood–cerebrospinal fluid barriers; a comparative account of mechanisms and roles

Fig. 19

Schematic diagram of K+ exchanges that are thought to be most important in regulation of [K+]ISF and brain K+ content: a between plasma and astrocytes via the endothelial cells, the basement membrane surrounding them and K+ channels in astrocyte endfoot membranes; b between plasma and ISF via the endothelial cells, the basement membrane and clefts between the endfeet; c between astrocytes and ISF; and d between ISF in the extracellular space and brain cells

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