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Figure 3


Fig. 3. The Malpighian tubule modeled as a single electrical cable (A) and as a double cable (B). In the single cable model, the single core resistance (Rco) is the axial resistance along the length of the tubule. It includes the tubule lumen and epithelial cells. In the double cable model, there are two axial resistances: the gap-junction resistance (Rgj) and the lumen resistance (Rlu). E, electromotive force; R, resistance; a, apical membrane; bl, basolateral membrane; sh, paracellular shunt pathway.





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