Cell Tranport

Front

What is Active Transport?

Back

An energy-requiring process that moves material across a cell membrane against a concentration gradient.

Front

What is Passive Transport?

Back

The movement of substances across a cell membrane without the need for energy, typically from an area of high concentration to an area of low concentration.

Front

What does Selectively Permeable mean?

Back

It means that cell membranes regulate which substances can enter and exit the cell.

Front

What is the main difference between Active and Passive Transport?

Back

Active transport requires ATP (energy) to move substances against a concentration gradient, while passive transport does not require energy.

Front

What is a Concentration Gradient?

Back

A difference in the concentration of a substance across a space, which drives the movement of substances during transport.

Front

What is an example of Active Transport?

Back

The sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What is an example of Passive Transport?

Back

Diffusion of oxygen or carbon dioxide across the cell membrane.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins facilitate the movement of substances across the cell membrane, especially for larger or polar molecules.

Front

What is Osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What happens during Endocytosis?

Back

The process by which a cell engulfs material from its environment, bringing it into the cell.