how does the contractile vacouole in a paramecium help maintain homostasis?.....
2006-10-10 15:35:30 · 3 answers · asked by molly m 1 in Education & Reference ➔ Homework Help
A contractile vacuole is a type of vacuole involved in osmoregulation. It pumps excess water out of a cell and is found prominently in freshwater protists.
In a Paramecium, a common freshwater protist, 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. When the vacuole is full, it expels the water through a pore in the cytoplasm which can be opened and closed. This pore has, in some forms of parmecium, disappeared entirely when not in use, leading to the idea of a "second cell" in paramecium.
Other protists, such as Amoeba, have contractile vacuoles that move to the surface of the cell when full and undergo exocytosis.
Retrieved from "http://en.wikipedia.org/wiki/Contractile_vacuole"
2006-10-10 15:43:55 · answer #1 · answered by pmjlagbao 2 · 0⤊ 0⤋
it takes up all of the cell's wastes and excess acid or bases and ejects it out into the environment
nvm i might be wrong
2006-10-10 22:38:10 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Mmm, I think it has something to do with the fact that it can choose to hold heat in or something similar....
2006-10-10 22:37:53 · answer #3 · answered by Nyki Marie 4 · 0⤊ 0⤋