What question did this study set out to answer?

The study aims to investigate how calcium ion concentration affects the directional movement of cilia in Triton-extracted models of Paramecium.

May 5, 1972Science

Reactivated Triton-Extracted Models of Paramecium : Modification of Ciliary Movement by Calcium Ions

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Randomized trial shows ciliary movement changes in Paramecium, suggesting calcium's key role in locomotion.

The study aims to investigate how calcium ion concentration affects the directional movement of cilia in Triton-extracted models of Paramecium.
Activated Triton-extracted models of Paramecium in varying concentrations of calcium ions.
Observed ciliary movement direction in relation to calcium levels.
Utilized adenosine triphosphate and magnesium ions in the solution.
Cilia beat normally (toward the rear) with calcium concentrations below 10^(-6)M.
Cilia beat in reverse (toward the front) when calcium concentration exceeds 10^(-6)M.
Ciliary reversal is linked to increased cytoplasmic calcium concentrations influencing membrane responses.

Naitoh et al. (1972) studied this question.

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