Figure 7. Gain of the transfer function under furosemide.

A, under the lower dose (T-Furo-I, mean (continuous line) ±s.e.m. (dotted lines), n = 7) the peak at 0.027 Hz was totally abolished, but the rest of the transfer spectrum was only slightly changed compared with control (dashed line). There may be a peak of higher gain at 0.018 Hz. Note that the slope of the drop in gain, below the corner frequency, resembled 20 rather than 40 dB per decade of frequency. B, under the higher dose (T-Furo-II, mean (continuous line) ±s.e.m. (dotted lines), n = 4) the peak at 0.027 Hz was also abolished, although the gain was not as much reduced as with the higher dose. The gain below 0.01 Hz was slightly higher than in control (dashed line), but still lower than 0 dB.