How contractile vacuole helps an amoeba to osmoregulate the body
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Answer:
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Explanation:
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. Other protists, such as Amoeba, have CVs that move to the surface of the cell when full and undergo exocytosis .To regulate osmotic pressure, most freshwater amoebae have a contractile vacuole (CV) that expels excess water from the cell. This organelle is necessary because the surrounding water is hypotonic with respect to the contents of the cell. Water is transferred across the amoeba's cell membrane by osmosis .Jun 27, 2015.A contractile vacuole is more difficult to see than a food vacuole because it includes fluid soluble excretory waste or just plain water, whereas food vacuoles have dark visible particles in them. But on observing a specimen for a while, the contractile vacuole becomes easily visible when its shrinks in size.The contractile vacuole helps maintain water balance in paramecia by expelling excess water that would otherwise that would otherwise accumulate and burst the cell. ... Contractile vacuoles pump out fresh water that accumulates in the organisms by osmosis.
Answer:
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. Other protists, such as Amoeba, have CVs that move to the surface of the cell when full and undergo exocytosis.
(OR)
To regulate osmotic pressure, most freshwater amoebae have a contractile vacuole (CV) that expels excess water from the cell. This organelle is necessary because the surrounding water is hypotonic with respect to the contents of the cell. Water is transferred across the amoeba's cell membrane by osmosis.
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