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2021-05-16

Which vacuole in the amoeba above is responsible for regulating water balance?

Which vacuole in the amoeba above is responsible for regulating water balance?

contractile vacuole

What is contractile vacuole in amoeba?

Amoeba is a unicellular organism. A contractile vacuole works just the same as the name suggests, in that it expands and contracts. The function of the contractile vacuole is to pump water out of the cell through a process called osmoregulation, the regulation of osmotic pressure.

What is the main function of contractile vacuole in amoeba?

In Amoeba contractile vacuoles collect excretory waste, such as ammonia, from the intracellular fluid by both diffusion and active transport.

What is present in food vacuole?

Food vacuoles are membrane-bound sacs within a cell, which contain food matter to be digested. These can be thought of as intracellular “stomachs,” where food is stored while it is broken down and its nutrients are extracted.

What is called food vacuole?

: a membrane-bound vacuole (as in an amoeba) in which ingested food is digested — see amoeba illustration.

What does a contractile vacuole do?

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.

How food vacuole is formed?

Food vacuoles form when the food is pushed towards the cell where the membrane bends inward. As the food pushes against the membrane, the membrane stretches inward until the food particle is completely in the cell, where the membrane then pinches off, forming a vacuole. This form of eating is called phagocytosis.

What happens if a food vacuole is defective?

The cell would have no chance to repair that damage as it would not be able to break down any complex molecules and transform them into what is needed. Moreover, the cell would “starve” as it wouldn’t be able to store all nutrients properly. Conclusion: A plant cell would die without a vacuole.

Do fungi cells have vacuoles?

A vacuole (/ˈvækjuːoʊl/) is a membrane-bound organelle which is present in plant and fungal cells and some protist, animal, and bacterial cells. Vacuoles are formed by the fusion of multiple membrane vesicles and are effectively just larger forms of these.

What does the vacuole do in a fungal cell?

The fungal vacuole is a large, membrane-bounded organelle that functions as a reservoir for the storage of small molecules (including polyphosphate, amino acids, several divalent cations (e.g. calcium), other ions, and other small molecules) as well as being the primary compartment for degradation.

What is the difference between contractile vacuole and food vacuole?

Food vacuole are used by protozoans as temporary food store in the organism’s protoplasm until it is required by the organism. Contractile vacuoles, on the other hand, are used by protozoans as means of expelling excess water and some waste out the protoplasm.

Why do plant cell have large vacuoles?

Vacuoles are the membrane-bound cell organelles found in all plant and animal cells. The plant has the largest vacuole than animal cells because in plant cells the larger central vacuole performs two functions, one is to store water and the other is to help the plant remain upright.

What would happen to the size of the central vacuole of a plant doesn’t have enough water?

The central vacuole stores water. What would happen to the size of the central vacuole if a plant does not have enough water? The plant would dehydrate and wilt (shrivel). The vacuole would be full and large not shrivelled.