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Science, 1990
Recent reappraisals of the role of ionized magnesium in cell function suggest that many cells maintain intracellular free Mg 2+ at low concentrations (0.1 to 0.7 mM) and that external agents can influence cell function via changes in intracellular Mg 2+ concentration.
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Morphology and Cytology of Paramecium

1986
Throughout the world, paramecia have been intensively studied with the electron microscope (EM), and a number of these micrographs—many original—are included in this and other chapters.
Ralph Wichterman, Ralph Wichterman
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Chemosensory transduction in Paramecium

European Journal of Protistology, 1998
Summary Paramecium tetraurelia is attracted and repelled by a variety of chemical stimuli. The attractants probably signify the presence of nutrients. For attractants, there are at least three signal transduction pathways that all lead to a hyperpolarization of the cell that results in relatively fast and smooth swimming. The three pathways differ in
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Methylcholanthrene and the Environment of Paramecium