The response height versus stimulus intensity curve of the ventral nerve photoreceptor of Limulus depending on adaptation and external calcium concentration.
D000200:Action Potentials; D000221:Adaptation, Ocular / Q000187:drug effects; D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D006737:Horseshoe Crabs / Q000502:physiology*; D010786:Photoreceptor Cells / Q000187:drug effects / Q000502:physiology*
D002118:Calcium