Cell Transport

Front

What is equilibrium in the context of cell transport?

Back

Equilibrium is the state when the concentration of particles inside a cell is the same as the concentration of particles outside the cell.

Front

What is diffusion?

Back

Diffusion is the movement of molecules across a membrane from an area of high concentration to an area of low concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process where molecules diffuse through a protein channel in the membrane, moving from high concentration to low concentration.

Front

What is active transport?

Back

Active transport is the process where cells use energy to move materials across a membrane from an area of low concentration to an area of high concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What role do protein channels play in facilitated diffusion?

Back

Protein channels provide a pathway for specific molecules to pass through the cell membrane during facilitated diffusion.

Front

How does concentration gradient affect diffusion?

Back

Diffusion occurs more rapidly when there is a steep concentration gradient, meaning a large difference in concentration between two areas.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion occurs directly through the membrane, while facilitated diffusion requires protein channels to help move molecules.

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.