CELL TRANSPORT

Front

What is facilitated diffusion?

Back

Movement of molecules across the cell membrane from an area of high concentration to low concentration.

Front

What does the term 'phagocytosis' mean?

Back

Phagocytosis refers to 'cell eating' and describes a type of endocytosis.

Front

What is one function of proteins in the cell membrane?

Back

To allow substances to cross the plasma membrane via facilitated diffusion or active transport.

Front

What type of active transport allows food to move into the cell?

Back

Endocytosis.

Front

What happens to the plasma membrane during endocytosis?

Back

It will form a vesicle surrounding material that needs to be moved in or out of a cell.

Front

Define diffusion.

Back

The movement of molecules from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

The diffusion of water through a selectively permeable membrane.

Front

What is active transport?

Back

The movement of molecules across a cell membrane against the concentration gradient, requiring energy.

Front

What is the role of the sodium-potassium pump?

Back

To actively transport sodium out of the cell and potassium into the cell, maintaining cellular function.

Front

What is exocytosis?

Back

The process by which a cell expels materials in vesicles that fuse with the plasma membrane.