Tonicity and Osmosis

What will happen to a cell in a hypotonic solution?

• The cell will swell up.

• The cell will shrink.

• The cell will remain the same size.

• The cell will burst immediately.

What is a hypertonic solution?

• A solution with a lower concentration of solutes compared to the inside of the cell.

• A solution that has the same concentration of solutes as the inside of the cell.

• A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to leave the cell.

• A solution that causes cells to swell due to water influx.

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How does osmosis affect plant cells?

• Osmosis helps maintain turgor pressure in plant cells, which is essential for structural support.

• Osmosis causes plant cells to lose water and become limp.

• Osmosis has no effect on plant cells.

• Osmosis increases the temperature of plant cells.

What happens to a cell in a hypertonic solution?

• The cell will shrink.

• The cell will swell.

• The cell will remain the same size.

• The cell will burst.

What is another word that can be used to describe 'homeostasis'?

• BALANCE

• STABLE

• VARIABLE

• DYNAMIC

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What is turgor pressure?

• The pressure exerted by water inside the central vacuole of a plant cell, helping maintain its shape.

• The force that drives photosynthesis in plant cells.

• The pressure exerted by the cell wall on the cytoplasm of a plant cell.

• The amount of water absorbed by the roots of a plant.

What is the significance of feedback regulation in homeostasis?

• It helps maintain stability in the internal environment by adjusting physiological processes in response to changes.

• It disrupts the internal environment by causing constant fluctuations.

• It has no impact on the internal environment and is merely a theoretical concept.

• It only applies to external environmental changes and not internal processes.

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Define osmosis.

• Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

• Osmosis is the process of diffusion of solutes across a membrane.

• Osmosis is the movement of solutes from an area of higher concentration to an area of lower concentration.

• Osmosis is the absorption of nutrients by plant roots from the soil.

Give an example of a substance that moves via passive transport.

• Oxygen

• Glucose

• Sodium ions

• Potassium ions

What is an isotonic solution?

• A solution with a higher concentration of solutes than the inside of the cell, causing water to move into the cell.

• A solution with a lower concentration of solutes than the inside of the cell, causing water to move out of the cell.

• An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

• A solution that contains no solutes at all, resulting in a vacuum effect.

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