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Literature DB >> 1080076

The fine structure of the iris of the grass frog, Rana pipiens.

Abstract

The iris of the grass frog Rana iiens, can respond to light even when isolated from the remainder of the animal. The iris is a three-layered structure, comprising a stromal layer and two layers of pigment epithelium. The sphincter pupillae, which is composed of pigmented smooth muscle cells, is embedded between the two layers of pigment epithelium. There is no dilator pupillae in this species. We have been unable to find any cells or any organelles in the iris which are anatomically specialized for photoreception in any obvious way.

Entities: Disease Species

Mesh：

Year: 1975 PMID： 1080076 DOI： 10.1007/bf00219954

Source DB: PubMed Journal: Cell Tissue Res ISSN： 0302-766X Impact factor: 5.249

17 in total

1. AN ELECTRON MICROSCOPIC STUDY OF WOLFFIAN LENS REGENERATION IN THE ADULT NEWT.

Authors: S KARASAKI
Journal: J Ultrastruct Res Date: 1964-10

2. Observations on the direct effect of light on the irides of Rana temporaria and Xenopus laevis.

Authors: R A WEALE
Journal: J Physiol Date: 1956-05-28 Impact factor: 5.182

3. A simple rapid polychrome stain for epoxy-embedded tissue.

Authors: T Sato; M Shamoto
Journal: Stain Technol Date: 1973-09

4. A low-viscosity epoxy resin embedding medium for electron microscopy.

Authors: A R Spurr
Journal: J Ultrastruct Res Date: 1969-01

5. Myofilaments of the pupillary muscles of the iris fixed in situ.

Authors: R E Kelly; J W Arnold
Journal: J Ultrastruct Res Date: 1972-09

6. Pupillary responses in the toad as related to innervation of the iris.

Authors: P B Armstrong; A L Bell
Journal: Am J Physiol Date: 1968-03

7. Threshold and action spectrum of the elasmobranch pupillary response.

Authors: K P Kuchnow
Journal: Vision Res Date: 1970-10 Impact factor: 1.886

8. The sphincter pupillae of the guinea-pig: structure of muscle cells, intercellular relations and density of innervation.

Authors: G Gabella
Journal: Proc R Soc Lond B Biol Sci Date: 1974-07-30

9. Direct action of light in naturally pigmented muscle fibers. I. Action spectrum for contraction in eel iris sphincter.

Authors: H H SELIGER
Journal: J Gen Physiol Date: 1962-11 Impact factor: 4.086