Membrane Transport

Front

What is membrane transport?

Back

The process by which substances move across the cell membrane, including passive and active transport.

Front

Define passive transport.

Back

The movement of molecules across the cell membrane without the use of energy, typically from high to low concentration.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy (ATP) to move substances from low to high concentration.

Front

What happens to a cell in a hypertonic solution?

Back

The cell shrinks as water moves out of the cell to balance the concentration of solutes outside.

Front

What is an isotonic solution?

Back

A solution where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

Front

What is a hypotonic solution?

Back

A solution with a lower concentration of solutes compared to the inside of the cell, causing the cell to swell as water enters.

Front

Explain the term 'equilibrium' in the context of membrane transport.

Back

Equilibrium is reached when the concentration of a substance is equal on both sides of the membrane, resulting in no net movement.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the role of transport proteins in membrane transport?

Back

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

Front

Define diffusion.

Back

The process by which molecules spread from an area of high concentration to an area of low concentration until evenly distributed.