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Because the fluid inside an amoeba has a greater concentration of dissolved substances in it than in the surrounding fluid in which it lives and its cell membrane is semi-permeable, i.e. it blocks the large molecules inside from escaping but lets water through. This produces an effect known as osmosis; there is an osmotic pressure gradient across its cell membrane from the region of low concentration to high. Therefore water crosses the membrane from outside to inside, trying to equalise the concentrations. As a result, the amoeba has to expend energy to remove this water, "pushing uphill" against the gradient, using organelles adapted for this purpose. Othewise it would swell up and burst.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoAmoeba is a microphagous feeder, which means that it feeds upon small aquatic organisms like bacteria, flagellates, ciliates and minute food particles.
When a hungry Amoeba approaches to some food particle, it produces out its pseudopodia in the form of food cup which engulf the food particle by turning into food vacuole. the food also contain some water. this complete ingestion. the next step is digestion which is faciliated by the lysosomes. A few lysosomes surround the food vacuole and get fused with the membrane to discharge their enzymatic contents(proteases, amylases and lipases)into it. Hence the digestion is intacellular. At this stage the vacuole becomes a digestive vacuole. It decrease in size as the water is withdrawn and its content first become acidic(pH 5.6) and then alkaline(pH 7.3). When the digestion is completed, the digestive vacuole membrane is drawn into numerous fine canals. the soluble food particles are passed into the canals and finally into the surrounding cytoplasm by micropinocytosis. the digested food, water and minerals are absorbed(absorption) into the cytoplasm and circulate in it, through cyclosis where the food is assimilated into new protoplasm or is oxidized to librate energy. the undigested food is egested by exocytosis at the rear end.
Rabia Basry student of xi class
Wiki User
∙ 15y ago-hypotonic cell
-semipermeable cell membrane
-osmosis
-flow of water
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What would happen to fresh water amoeba if placed in salty water?
It will lose its water to the salty water by osmosis, the amoeba will crenate and die due to excessive loss of water.
How does osmosis and diffusion work in amoeba?
Amoeba obtains oxygen via diffusion; it takes in water by osmosis, but I would think this is more of a problem, since Amoeba lives in a freshwater environment, and water is always entering by osmosis. Amoeba's problem is getting rid of that water, which it does by means of contractile vacuoles.
What would happen if euglena did not have a contractile vacuole?
As the osmotic pressure of water, water going down it's concentration gradient, built up in the cell there would be increasing pressure on the cell membrane and without the vacuole to relieve this pressure the cell would burst.
What microscope would you use to observe a living amoeba?
living things
Why do protists need contractile vacuoles?
If the solution inside the amoeba is more concentrated than the outside, the water will diffuse into the cell through osmosis and eventually cause it to burst when there is way too much. The contractile vacuole prevents it from bursting by pumping water back out.
Why does water make you pee?
Your body takes on excess water and gets rid of what it doesn't need. If excess water was allowed to accumulate in the blood, you would have dilute, watery blood, which would not do its job properly.
Why would an Amoeba die if placed in salt water?
Freshwater amoeba in salt water will have a higher solute content outside of the amoeba. The water in the amoeba will want to move out of the amoeba and into the environment. This will cause the amoeba to shrivel and die.
What would happen to fresh water amoeba if placed in salty water?
It will lose its water to the salty water by osmosis, the amoeba will crenate and die due to excessive loss of water.
Why is the contractile vacuole such an important organelle in Paramecium?
The contractile vacuole removes the excess water that enters the organism through osmosis (passive transport doest not require ATP) down a concentration gradient. Because the water is more concentrated on the outside of the organism in the fresh water of its habitat the water enters the organism by osmosis. The water on the outside is hypertonic and the water on the inside of the organism is hypotonic. The contractile Vacuole acts as a pump to remove and excess water without this the cell would burst from to much excess water.
How does osmosis and diffusion work in amoeba?
Amoeba obtains oxygen via diffusion; it takes in water by osmosis, but I would think this is more of a problem, since Amoeba lives in a freshwater environment, and water is always entering by osmosis. Amoeba's problem is getting rid of that water, which it does by means of contractile vacuoles.
Why does amoeba die when cyanide is added to its water?
Cyanide is a toxic acid or salt and is deadly to just about any carbon based human life form. When Cyanide is added to the water of an Amoeba it stops the contractile vacuole from working, the contractile vacuole is vital in the survival of the Amoeba, because without it the Amoeba would basically just explode with water and die. The contractile vacuole pumps away the excess water. But, when cyanide is added to the water like I said the contractile vacuole will malfunction and not work. This will in the end result in the death of the cell.... I hope that helped!! :)
What controls the water content in an amoeba?
In an amoeba, the water content is controlled by the contractile vacuole. It fills with water (entering the amoeba by osmosis) and then empites the water once it reaches a certain level. If water was not displaced by the contractile vacuole, then the amoeba would burst.
Where would you find a amoeba?
Any freshwater body of water in a tropical region. In the hot seasons the amoeba swim all throughout the water and thrive, but in the cold seasons they live in the sand/muck in the bottom of the water.
What would cause a water heater to accumulate water between the tank and the case?
Condensation Or the tank rusted out
Can amoeba be in a swimming pool?
Possibly. In some hot pools amoeba are a problem. They get washed into the pool with rain water. If your swimming pool is well maintained - chlorinated correctly - maybe amoeba won't be a problem.
What will happen if an amoeba is placed in a solution that is less concentrated than its cytoplasm?
I believe the solution would be considered hypotonic. in which case the amoeba would let water (H2O) out of its body to regulate the solute concentration (to make it equal)
When would mitosis occur in amoeba?
Amoeba reproduces by binary fission .
