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Fig. 6. Effect of 104 mol l1
hydrochlorothiazide on secretion rate (mean ±
S.E.M.) of tubules bathed in control saline
and K+-free saline. Tubules were exposed to the vehicle alone
(filled symbols; 0.1% ethanol) or to the vehicle plus hydrochlorothiazide
(open symbols). Arrows indicate the time of addition of hydrochlorothiazide.
The number of tubules per group is indicated in parentheses.