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Digitale Medien

Electroencephalograph During ‘Feigned’ Sleep in the Opossum (1964)

NORTON, ALLEN C. ; BERAN, ANTHONY V. ; MISRAHY, GEORGE A.

[s.l.] : Nature Publishing Group

Nature 204 (1964), S. 162-163

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Details

ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] THE opossum state, or 'feigned' sleep, is a well-known phenomenon in American folk-lore. Behaviourally it is a defence mechanism by which an opossum discourages a would-be attacker by pretending to be dead. When attacked, the opossum assumes a characteristic posture, curling itself into a round ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/204162a0

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Volltext

Digitale Medien

An electron microscope study of the rat endometrium during delayed implantationSupported by National Science Foundation grant G-21829. During the course of this investigation, the senior author was a National Science Foundation Graduate Fellow. (1964)

Warren, Robert H. ; Enders, Allen C.

New York, NY [u.a.] : Wiley-Blackwell

The @Anatomical Record 148 (1964), S. 177-195

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ISSN: 0003-276X

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Medizin

Notizen: The luminal and glandular epithelia of the rat uterus during delayed implantation have been studied with the electron microscope. The tall columnar cells of the luminal epithelium are characterized by a distinct zonation of organelles. On the free surface there are short microvilli and occasional cytoplasmic extrusions, with terminal bars joining adjacent cells at their apical margins. Beneath the free surface are numerous pinocytotic vesicles and mitochondria. Above the nucleus are a prominent Golgi apparatus with large dilated vacuoles, and numerous dense inclusion bodies. Large clusters of lipid droplets and aggregations of mitochondria occupy the basal zone of the cell.The apical portion of the gland cell has fewer pinocytotic vesicles and the Golgi is smaller than in the luminal epithelial cells. Dense bodies are numerous above the nucleus. The basal portion of the gland cell is devoid of lipid, but there are often one or more enlarged mitochondria. Although a dense PAS+ substance fills the lumina of the glands, there is no obvious evidence of secretory activity in the glands during delay.The relationships of the epithelia to the environment of the blastocysts during delay is discussed.

Zusätzliches Material: 7 Ill.