Figure 3. Changes in CBF and cell volume during 10 μm terbutaline stimulation.

A, a typical response of ciliary beat frequency (CBF, left y-axis, •) and relative cell volume (V/V₀, right y-axis, (⋄ (red)). Terbutaline stimulation (period of stimulation shown by horizontal bar) increased CBF and decreased cell volume immediately. B, CBF ratios (CBF/CBF₀ (•)) and V/V₀ values (⋄ (red)) during terbutaline stimulation in seven experiments. C, the CBF ratios and V/V₀ values in the first minute of terbutaline stimulation. Cell shrinkage preceded the CBF increase. *Paired values significantly different from those at time 0 (P < 0.05).