THE CONTRACTILE VACUOLE INPARAMECIUM TRICHIUM
نویسندگان
چکیده
منابع مشابه
Contractile vacuole in the amoeba Pelomyxa carolinensis.
RIDDICK, DANIEL H. Contractile vacuole in the amoeba, Pelomyxa carolinensis. Am. J. Physiol. 215(3): 736-740. 1968.-The osmolality of the cytoplasm and contractile vacuole of the giant amoeba Chaos chaos was determined by micropuncture. Sodium and potassium concentrations of the cytoplasm and contractile vacuole were similarly obtained. Single contractile vacuoles were isolated. It was determin...
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The contractile vacuole complex (CVC) of some protists serves for the osmotic equilibration of water and ions, notably Ca(2+), by chemiosmotic exploitation of a H(+) gradient generated by the organelle-resident V-type H(+)-ATPase. Ca(2+) is mostly extruded, but there is also some reflux into the cytosol via Ca(2+)-release channels. Most data available are from Dictyostelium and Paramecium. In P...
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The contractile vacuole is an organelle found in most freshwater Protozoa. In ameba, as studied with the light microscope, it is usually described as spherical, with a rather thick limiting membrane and surrounded by a layer of mitochondria (Fig. 1). The contractile vacuole undergoes a continuous series of cyclic changes. I t enlarges gradually (diastole), collecting water until it reaches a cr...
متن کاملThe Contractile Vacuole and Related Structures in Tetrahymena Pyriformis.
SYNOPSIS. The nephridial system of T . pyriformis consists of a contractile vacuole with its two pores and an elaborate network of tubules. Both the vacuole and its tubules constitute a continuous system of single membranes of approximately 70 A in thickness. TubuLr fibrils of about 250 A extend from the pore wall t o the vacuole membrane and appear to function in dilating the pore prior to sys...
متن کاملUltrastructure of an unusual contractile vacuole in several chrysomonad phytoflagellates.
The infrastructure of the contractile vacuole of Ochromonas and Poterioochromonas species is described. It appears to be a permanent structure in the anterior end of the phytoflagellate, consisting of a central cavity with a unit-membrane lining from which flattened saccules protrude in all directions. The contracted saccules are about 40 nm in diameter and are made up of a single trilammellar ...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1928
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1537149