ELECTRON MICROSCOPY OF THE OXYNTIC CELL IN THE GASTRIC GLANDS OF THE BULLFROG, <i>RANA CATESBIANA  </i>

Sedar, Albert W.

doi:10.1083/jcb.14.1.152

Cited by 31 publications

(1 citation statement)

References 29 publications

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“…The apical cytoplasm of the gastric oxyntic or acid-secreting cell contains a striking array of smooth-surfaced tubular elements (6,7,14,16) . These smooth-surfaced elements may assume various shapes depending on preparatory procedures, so that profiles of elongated elements and vesicles are observed (8,15) .…”

Section: Introductionmentioning

confidence: 99%

Uptake of Peroxidase Into the Smooth-Surfaced Tubular System of the Gastric Acid-Secreting Cell

Sedar

1969

The Journal of Cell Biology

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Section: Introductionmentioning

confidence: 99%

Uptake of Peroxidase Into the Smooth-Surfaced Tubular System of the Gastric Acid-Secreting Cell

Sedar

1969

The Journal of Cell Biology

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The fine structure of the aglomerular nephron of the toadfish, Opsanus tau

Bulger

1965

Am. J. Anat.

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Kidney cell fine structure in the aglomerular fish, Opsanus tau, varies profoundly with different fixation procedures. An extensive system of cisternae, tubules and irregular-shaped elements of smooth-surfaced membranes are seen in the basal cytoplasm after fixation with 2% OsOa buffered with s-collidine. Permanganate fixation demonstrates these membranes as extensions of the basal plasmalemma. Mitochondria and homogeneous bodies surrounded by a single dense membrane lie in close association with the basal membranes. The apical cytoplasm contains an abundance of smooth-surfaced elements whose morphology varies with the fixation procedure used. The fine structure of these cells is discussed with respect to that of other ion transporting tissues and with respect to the concept that basal infoldings are related to "water reabsorption." Rhodin ('56, '62) examined the fine structure of the kidney tubules of the aglomerular teleost, Lophius piscatorius. With the fixation procedures used by him, the cells of the aglomerular tubule were found to lack the basal infoldings of the plasma membrane which are present in the cells provided with brush borders in elasmobranch (Squalus acanthias), and mammalian kidneys. Due to the absence of glomeruli, urine formed by the aglomerular kidney has been presumed to result entirely from secretion. Inasmuch as basal infoldings were not seen in the aglomerular tubule, Rhodin concluded that basal infoldings of glomerular kidneys are involved in the process of water reabsorption Because of the far-reaching implications of this suggestion, it seemed important to re-examine this question in another aglomerular teleost.The toadfish, Opsanus tau, was selected for this study because of its availability, ease of maintenance, and because it has been studied by light microscopists and physiologists. MATERIAL AND METHODSToadfish, Opsanus tau, were obtained from the supply department of the Marine Biological Laboratory at Wood's Hole. Some were transported to Harvard Medical School where they were kept in cold oxygenated sea water until used. Others were maintained in tanks of running sea water AM. J. ANAT., 117: 171-192.

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The ultrastructure of the gastric mucosa in normal and hypophysectomized rats

Corpron

1966

Am. J. Anat.

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The objectives of this study were to observe with the electron microscope ( a ) the epithelial cell types found in the neck and isthmus of the gastric fundic gland of the rat, and ( b ) the effects of hypuphysectomy on the gland. The following cell types were distinguished in the neck of the fundic gland of the rat: nondifferentiated cell, immature surface cell, mucous neck cell, and neck parietal cell. In the normal gland, these cell types resembled each other in the possession of a ground cytoplasm and nucleoplasm of low density, a poorly developed endoplasmic reticulum, few mitochondria and numerous free ribosomes. The most important structural difference between mucous neck and immature surface cells was the contrasting density of the secretory granules; both cell types differed from the nondifferentiated cell primarily in the presence of their characteristic secretory granules. The neck parietal cell appeared to be a developmental form between the immature surface cell and the mature parietal cell. No changes were observed in these cells to result from hypophysectomy.Hypophysectomy caused marked involutional changes in the chief cell which involved mainly the organelles most directly concerned with protein synthesis, i.e., the ergastoplasm and Golgi apparatus. These effects were correlated with the loss of basophilia and secretory granules and with the reduction in cell size and capacity to secrete pepsinogen which were described previously. In contrast, the parietal cell, which is concerned with electrolyte transport, was affected much less.

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ELECTRON MICROSCOPY OF THE OXYNTIC CELL IN THE GASTRIC GLANDS OF THE BULLFROG, RANA CATESBIANA

Cited by 31 publications

References 29 publications

Uptake of Peroxidase Into the Smooth-Surfaced Tubular System of the Gastric Acid-Secreting Cell

Uptake of Peroxidase Into the Smooth-Surfaced Tubular System of the Gastric Acid-Secreting Cell

The fine structure of the aglomerular nephron of the toadfish, Opsanus tau

The ultrastructure of the gastric mucosa in normal and hypophysectomized rats

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