title: Hyperpolarizing photoreceptors in the eye of a primitive chordate, Salpa democratica.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002463:Cell Membrane Permeability; D004553:Electric Conductivity; D008564:Membrane Potentials; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology*; D014561:Urochordata / Q000033:anatomy & histology / Q000502:physiology*