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An electron micrograph of a convoluted distal tubule. In the SED-SHR (c), there is an increase in the space between the interdigitations (arrow), and the basal membrane (*) of the tubules exhibits a thickened appearance compared to the EX-SHR (d) and the SED-WKY (a) and EX-WKY (b) control groups. Abbreviations: EX, exercised; SHR, spontaneously hypertensive rats; SED, sedentary; WKY, Wistar-Kyoto rats.
