Mrs Disney Y10- Biology Transport across cell membranes

What is required for active transport in cells?

• Energy

• Diffusion

• Osmosis

• Facilitated diffusion

What is the process called when water diffuses across a membrane?

• Diffusion

• Osmosis

• Filtration

• Evaporation

How does temperature affect diffusion?

• Higher temperatures increase the energy of particles, leading to faster diffusion rates.

• Lower temperatures decrease the energy of particles, leading to slower diffusion rates.

• Temperature has no effect on the rate of diffusion.

• Higher temperatures cause particles to diffuse in a more organized manner.

What is diffusion?

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

• The process of particles moving randomly in all directions.

• The transfer of heat from one object to another.

• The mixing of two substances to form a solution.

Define osmosis.

• Osmosis is the movement of water molecules through a selectively permeable membrane from a region of low solute concentration to a region of high solute concentration.

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

• Osmosis is the movement of solutes from a region of high concentration to a region of low concentration.

• Osmosis is the absorption of nutrients by plant roots.

What happens to a cell when water moves out of it during osmosis?

• The cell shrinks.

• The cell expands.

• The cell remains the same size.

• The cell bursts.

What is endocytosis?

• A process by which cells expel substances from their interior.

• A method of cell division in prokaryotes.

• The process by which cells take in substances by engulfing them in a membrane.

• A mechanism for protein synthesis in ribosomes.

What is the significance of concentration gradients in transport?

• They prevent the movement of substances.

• They drive the movement of substances from areas of low concentration to high concentration.

• They drive the movement of substances from areas of high concentration to low concentration.

• They have no effect on the movement of substances.

What happens to cells when a person drinks salty water?

• Cells swell as water moves into the cell.

• Cells remain unchanged as salt concentration is balanced.

• Cells shrink due to water moving out of the cell to balance the salt concentration.

• Cells burst due to excessive water intake.

During osmosis, how does water move?

• Water moves from an area of low concentration to an area of high concentration.

• Water moves from an area of high concentration to an area of low concentration.

• Water moves in a circular motion within the cell.

• Water moves randomly without any concentration gradient.