Photoreceptors in Primitive Chordates: Fine Structure, Hyperpolarizing Receptor Potentials, and Evolution

Photoreceptors in Primitive Chordates: Fine Structure, Hyperpolarizing Receptor Potentials, and Evolution

Two species of primitive chordates have hyperpolarizing photoreceptor potentials, as vertebrates do. In Salpa the photoreceptive membrane is composed of microvilli, whereas in Amaroucium it is modified from cilia. There appears to be no functional correlation between fine structure of photoreceptive...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1971-06, Vol.172 (3987), p.1052-1054
Hauptverfasser: Gorman, A. L. F., McReynolds, J. S., Barnes, S. N.
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Biological Evolution
Cell membranes
Chordata, Nonvertebrate - anatomy & histology
Cilia
Electric potential
Eyes
Fine structure
Histology, Comparative
Membrane Potentials
Microscopy, Electron
P branes
Photoreceptor Cells - cytology
Photoreceptor Cells - physiology
Photoreceptors
Receptors
String theory
Vertebrates
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Zusammenfassung:Two species of primitive chordates have hyperpolarizing photoreceptor potentials, as vertebrates do. In Salpa the photoreceptive membrane is composed of microvilli, whereas in Amaroucium it is modified from cilia. There appears to be no functional correlation between fine structure of photoreceptive membrane and polarity of response to light.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.172.3987.1052