Cellular Transport

What happens to a cell in a hypotonic solution?

• Water moves out of the cell, causing it to shrink.

• Water moves into the cell, causing it to swell and potentially burst.

• The cell remains unchanged in size and shape.

• The cell becomes more rigid and less permeable.

What is homeostasis?

• A state of biological balance where an organism maintains stable internal conditions despite external changes.

• A process of cellular respiration in organisms.

• A method of reproduction in plants and animals.

• A type of evolutionary adaptation to environmental changes.

What is the role of the cell membrane in cellular transport?

• The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.

• The cell membrane provides structural support to the cell only.

• The cell membrane is responsible for energy production within the cell.

• The cell membrane acts as a storage unit for nutrients.

What is active transport?

• The movement of particles from high to low concentration without energy.

• The movement of particles against the concentration gradient, from low to high concentration, which requires energy (ATP).

• The process of diffusion where particles move freely across a membrane.

• The passive movement of water molecules through a semipermeable membrane.

What happens to a cell in a hypertonic solution?

• Water moves into the cell, causing it to swell.

• Water moves out of the cell, causing it to shrink or crenate.

• The cell remains the same size with no change.

• The cell bursts due to excess water intake.

What is a concentration gradient?

• A concentration gradient is the difference in concentration of a substance across a space, which drives the movement of particles.

• A concentration gradient is the uniform distribution of particles in a solution.

• A concentration gradient is the process of mixing two substances evenly.

• A concentration gradient is the increase in temperature of a substance over time.

What is osmosis?

• The movement of water from an area of high water concentration to an area of low water concentration across a semi-permeable membrane.

• The process of diffusion of solutes across a semi-permeable membrane.

• The movement of water from an area of low water concentration to an area of high water concentration.

• The absorption of nutrients by plant roots from the soil.

How does temperature affect diffusion?

• Increased temperature generally increases the rate of diffusion, as particles move faster at higher temperatures.

• Temperature has no effect on the rate of diffusion.

• Higher temperatures slow down the movement of particles, decreasing diffusion.

• Temperature only affects diffusion in gases, not in liquids or solids.

What is the significance of ATP in active transport?

• ATP is a nucleotide that stores genetic information.

• ATP provides the energy required for active transport to move substances against their concentration gradient.

• ATP is involved in the synthesis of proteins in the ribosome.

• ATP acts as a signaling molecule in cellular communication.

What is the difference between passive and active transport?

• Passive transport requires energy to move substances against their gradient, while active transport does not require energy and moves substances down their concentration gradient.

• Passive transport moves substances against their gradient without energy, while active transport moves substances down their concentration gradient with energy.

• Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.

• Passive transport and active transport are the same processes that do not involve energy.