Comparison of chemoreceptions of terminal buds and pit organs of the carp, Cyprinus carpio L.
Neural responses to several chemicals of the pit organs and terminal buds on the facial skin of the carp were compared electrophysiologically. Nerve inpulses from the pit organs were larger than those from the terminal buds. The pit organs were more sensitive to salts and especially acids than the terminal buds. The former did not respond to sucrose, silk worm pupa extract, betaine and amino acids except acidic ones. The latter, however, responded well to them.
D000818:Animals; D002347:Carps; D002628:Chemoreceptor Cells / Q000502:physiology*; D005071:Evoked Potentials; D005154:Facial Nerve / Q000502:physiology; D009412:Nerve Fibers / Q000502:physiology; D009474:Neurons / Q000502:physiology; D014276:Trigeminal Nerve / Q000502:physiology