THE CELL
STRUCTURE AND FUNCTION OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The vacuole sucks in water lost to the environment
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The vacuole pumps out excess water coming into the cell.
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The vacuole pumps in salt to offset the hypotonic conditions
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The vacuole pumps out excess salt diffusing into the organism
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Detailed explanation-1: -A contractile vacuole collects excess water from the cell and pumps it out, keeping the cell from lysing as it takes on water from its hypotonic environment.
Detailed explanation-2: -Experiment: The contractile vacuole is a star-shaped structure that helps the paramecium to pump out excess water. This adaptation allows the paramecium to survive in hypotonic (low solute concentration) solutions.
Detailed explanation-3: -The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
Detailed explanation-4: -In Paramecium, which has one of the most complex contractile vacuoles, the vacuole is surrounded by several canals, which absorb water by osmosis from the cytoplasm. After the canals fill with water, the water is pumped into the vacuole.