Normalized responses of Fura -2-AM
loaded geniculate ganglion neurons revealed that a subset (solid circles; 5/19) of WT neurons were activated by 10 μm 5 - HT; no neurons from 5 - HT3AKO animals (open circles; 0/25) responded to 5 - HT, yet all responded to 10 μm ATP and 55 mm KCl.