SB1d- Cell Transport

Front

What is osmosis?

Back

The diffusion of water through a semi-permeable membrane.

Front

What is the structure of the cell membrane?

Back

A bilayer of phospholipids that forms a barrier around the cell.

Front

What is a concentration gradient?

Back

A difference in the amount of particles between two areas.

Front

How do large molecules enter the cell?

Back

Through a process called endocytosis.

Front

What is active transport?

Back

The movement of substances from low concentrations to high concentrations, requiring energy.

Front

What is passive transport?

Back

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

Front

What is facilitated diffusion?

Back

The process of transporting substances across a cell membrane with the help of carrier proteins.

Front

What is the role of protein channels in the cell membrane?

Back

They allow specific molecules to pass through the membrane, facilitating transport.

Front

What is endocytosis?

Back

The process by which cells take in large molecules by engulfing them in a membrane.

Front

What is exocytosis?

Back

The process by which cells expel large molecules by vesicles fusing with the cell membrane.