Conner J D
Neurosci Lett. 1982 Jun 30;30(3):245-50. doi: 10.1016/0304-3940(82)90407-4.
The relation between excitation and adaptation in vertebrate rod photoreceptors was studied by measuring the membrane current of toad rod outer segments in light the darkness. Steady illumination attenuated and sped and rod response to flashes, and it suppressed membrane current noise. When steady illumination ended, the rod's electrical response, the presumably the internal transmitter which caused it, decayed quickly, but adaptation's effects persisted temporarily. This new observation suggests that excitation and adaptation are loosely coupled phenomena which may be mediated by different chemical signals.
通过测量蟾蜍视杆细胞外段在明、暗中的膜电流，研究了脊椎动物视杆光感受器中兴奋与适应之间的关系。持续光照会减弱并加速视杆细胞对闪光的反应，还会抑制膜电流噪声。当持续光照结束时，视杆细胞的电反应以及可能引发该反应的内部递质会迅速衰减，但适应的影响会暂时持续。这一新观察结果表明，兴奋与适应是可能由不同化学信号介导的松散耦合现象。
