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If a paramecium were to swim from a hypotonic environment to an isotonic one would the activity of its contractile vacuole increase or decrease?
Wiki User
∙ 10y ago
The activity of the contractile vacoule would decrease. While in the hypotonic solution, water was moving into the paramecium because it had a higher solute concentration that the solution that it was in and water follows solute. So, the isotonic solution would contain the same solute concentration as the paramecium so there would be no net water movement. Therefore, the contractile vacoule would decrease in its activity because there would be no water entering or exiting the paramecium.
Wiki User
∙ 10y ago
Wiki User
∙ 13y agoSince paramecium live in freshwater environments, freshwater is hypotonic towards paramecium, so it would '''expand''' (surrounding water goes into the paramecium). However, note that paramecium has a pair of contractile vacuoles that performs osmoregulation, which expels water out of the paramecium.
Wiki User
∙ 14y agono it should be in an isotonic external environment to deal with osmosis
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