While it has been suggested that, for myocardial (37) and muscle (23) capillaries, the aggregate filtration coefficient for endothelial cells for water may be comparable with or even greater than that for the "small pores" (32), the contribu- tion of the permeability to water of the podocyte plasmalemma hardly seems likely to be significant for glomerular filtration, since the glomerulus has a hydraulic conductivity 40 500 times greater (11, 14) than that of muscle capillaries.
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A stereological study of the glomerular filter in the rat. Morphometry of the slit diaphragm and basement membrane.
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