Cellular Processes Review

What is an isotonic solution?

• A solution with a higher solute concentration outside the cell than inside.

• A solution with a lower solute concentration outside the cell than inside.

• A solution with equal solute concentrations inside and outside the cell, resulting in no net movement of water.

• A solution that causes cells to swell due to excess water intake.

What is the function of the cell membrane?

• To provide energy to the cell

• To regulate what enters and exits the cell, maintaining homeostasis and protecting the cell's internal environment.

• To store genetic information

• To facilitate cell division

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What is the significance of concentration gradients in cellular processes?

• They prevent the movement of substances across membranes.

• They drive the movement of substances across membranes, influencing processes like diffusion and osmosis.

• They have no effect on cellular processes.

• They only affect the movement of water in cells.

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What happens to a cell in a hypotonic solution?

• The cell shrinks due to water loss.

• The cell remains unchanged in size.

• Water enters the cell, causing it to swell or burst.

• The cell becomes rigid and loses its shape.

What is the difference between osmosis and diffusion?

• Osmosis refers to the movement of solutes, while diffusion refers to the movement of water.

• Osmosis specifically refers to the movement of water, while diffusion refers to the movement of solutes.

• Osmosis and diffusion are the same processes with no differences.

• Osmosis occurs only in plants, while diffusion occurs in animals.

What is a hypertonic solution?

• A solution with equal solute concentration inside and outside the cell.

• A solution that has a lower solute concentration outside the cell than inside.

• A hypertonic solution has a higher solute concentration outside the cell than inside, causing water to move out of the cell, leading to cell shrinkage.

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

What is diffusion?

• Diffusion is the movement of particles from an area of high concentration to an area of low concentration, resulting in even distribution.

• Diffusion is the process of particles moving against a concentration gradient.

• Diffusion is the mixing of two substances to form a solution.

• Diffusion is the transfer of heat through direct contact between materials.

What is osmosis?

• The movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

• The process of diffusion of gases across a membrane.

• The absorption of nutrients by cells through active transport.

• The movement of solutes from an area of higher concentration to an area of lower concentration.

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What is facilitated diffusion?

• The movement of materials across the cell membrane with the help of special carrier proteins, without the use of energy.

• The process of actively transporting molecules against their concentration gradient using energy.

• The diffusion of water across a selectively permeable membrane.

• The movement of materials through the cell membrane via vesicles.

What role do carrier proteins play in cellular processes?

• They assist in the transport of substances across the cell membrane, particularly during facilitated diffusion.

• They are involved in the synthesis of proteins within the cell.

• They act as enzymes to speed up chemical reactions in the cell.

• They provide structural support to the cell membrane.

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