2007-03-07 11:57:15 · 3 answers · asked by dawooz1991 1 in Science & Mathematics ➔ Biology
When the contractile vacuole contracts it expels the extra water is has collected. It gets rid of cellular waste and excess water.
2007-03-07 12:03:17 · answer #1 · answered by physandchemteach 7 · 0⤊ 0⤋
The contractile vacuole in a paramecium helps it maintain homeostasis. When the paramecium is placed in a hypotonic environment, it pumps the water out of the cell at the same rate that osmosis is pumping it into the cell.
2007-03-07 13:25:55 · answer #2 · answered by S-dawg 1 · 0⤊ 0⤋
A vacuole is a well-known membrane-certain compartment particularly eukaryotic cells that serve one in all those diverse applications. Vacuoles could capture foodstuff or undesirable structural debris around the cellular. they permit a cellular to transport, eliminate, lock out, or capture one in all those diverse components interior the cellular. with out vacuole, eukaryotic cells won't have the skill to synthesize foodstuff or eliminate pollutants. A contractile vacuole helps protists eliminate extra liquid interior the cellular. This pumping functionality reduces osmotic stress and forestalls the cellular from bursting, a situation referred to as cytolysis or osmotic lysis. Contractile vacuoles are maximum frequently cutting-edge in freshwater protozoa like paramecium and amoeba. All vacuoles which contain contractile vacuoles are often crammed with cellular sap, it somewhat is a liquid of various composition. the dimensions and shape of vacuoles could selection critically besides, with some cells cycling from season to season to whether or no longer they have one super vacuole or varied small ones. some vacuoles have the twin purpose of additionally protecting photosynthetic components on the threshold of the cellular membrane, and as a result on the threshold of gentle.
2016-12-18 17:38:13 · answer #3 · answered by ? 3 · 0⤊ 0⤋