Responses of Photoreceptors in Hermissenda

  title={Responses of Photoreceptors in Hermissenda},
  author={Daniel L. Alkon and M. G. F. Fuortes},
  journal={The Journal of General Physiology},
  pages={631 - 649}
The five photoreceptors in the eye of the mollusc Hermissenda crassicornis respond to light with depolarization and firing of impulses. The impulses of any one cell inhibit other cells, but the degree of inhibition differs in different pairs. Evidence is presented to show that the interactions occur at terminal branches of the photoreceptor axons, inside the cerebropleural ganglion. Properties of the generator potential are examined and it is shown that the depolarization develops in two phases… CONTINUE READING