Question: Why Can’T You See The Cell Membrane In Elodea Cells?

What happens to an elodea cell in salt water?

When the Elodea was placed in the salt solution, the vacuoles disappeared and the protoplasm came away from the cell wall making the organelles appear to be clumped in the middle of the cell.

Therefore, if it were placed in a hypertonic solution it would lose water and shrivel..

Why do elodea cells not burst?

This picture shows normal Elodea. The chloroplasts are spread throughout the cell both before the salt solution, and after the distilled water is put onto the slide. Distilled water represents a hypotonic solution, yet the cells do not burst because of the cell wall.

Does salt kill cells?

Salt Sucks, Cells Swell The loss of water from this movement causes plant cells to shrink and wilt. This is why salt can kill plants; it leaches the water from the cells.

What would you need to do to reverse Plasmolysis in the elodea cells?

Plasmolysis can be reversed if the cell is placed in a hypotonic solution. Stomata help keep water in the plant so it does not dry out. Wax also keeps water in the plant.

What structures are visible in the elodea leaf cells?

What visible structures do the Elodea and the onion skin cells share? A cell wall, a nucleus, a cell membrane and a cytoplasm. What structures do the Elodea cells have that the red onion skin cells lack? They have chloroplasts because they need the chlorophyll to produce ATP energy from the sun (for food).

What happens when plant cells are placed in saltwater?

When plant cells are put in really salty water, water diffuses/moves out of the cell and the central vacuole shrinks. When animal cells are put in salty water, water diffuses/moves out of the cell and the cell shrivels up. … Plant cells don’t burst if a lot of water diffuses/moves into them because of their cell wall.

What happens to cells in salt solution?

No osmosis occurs. … Red blood cells placed in a solution with a lower water concentration compared to their contents (eg 1.7 per cent salt solution) will lose water by osmosis and shrink. Water will diffuse from a higher water concentration inside the cell to a lower water concentration outside the cell.

What would happen if these cells were allowed to remain in the salt solution for several hours?

what would you expect to happen if these cells were allowed to remain in the salt solution for several hours? we could expect even more to happen if these cell structure b/c it was left in longer than the elodea leaf that was only in the hypertonic solution for ten minutes.

What happens to the elodea cells in a 20% sucrose solution?

This is because water will be drawn out of the vacuole through osmosis, the protoplast will shrink, and the plasma membrane will actually pull away from the cell wall (plasmolysis), resulting in a loss of turgor pressure. The following image shows an Elodea leaf that was placed in a 20% sucrose (sugar) solution.

What prevents elodea cells from completely collapsing?

The tough cell wall, made of cellulose and pectin, keeps the cells from bursting under the pressure. You can easily see this in action, by picking any plant. When you have first picked it, you can hold it up and see that it stays upright in your hand.

How big is an elodea cell?

The plasma membrane is too thin to see at this magnification. In the printed image the students work with, the mitochondria aren’t visible. What’s the Size? A “typical” Elodea cell is approximately 0.05 millimeters long (50 micrometers long) and 0.025 millimeters wide (25 micrometers wide).

How do your elodea cells in 10% NaCl compare to your original elodea cells?

On the Elodea cells the 10% NaCl solution causes the cell membrane to shrink but the cell wall of plants prevents the entire cell from shrinking. Because of this the cell appears to have the chloroplasts clustered in the center. … This can be difficult to see since Elodea is an aquatic plant.

What type of cells do elodea plants have?

This Elodea leaf cell exemplifies a typical plant cell. It has a nucleus, and a stiff cell wall which gives the cell its box-like shape. The numerous green chloroplasts allow the cell to make its own food (by photosynthesis).

Why do elodea cells shrink in salt water?

When the salt solution is added, the salt ions outside the cell membrane cause the water molecules to leave the cell through the cell membrane causing it to shrink into a blob in the centre of the cell wall. The movement of water molecules is called osmosis.

Why is it better to mount cells in saline than water?

When the plant cells are placed in the salt solution, there is a higher concentration of water molecules in the cell and a lower concentration of water in the salt solution and thus a concentration gradient has been set up. … The cell membrane is now pressed up against the cell wall and the cell is said to be turgid.