Cell Membrane and Cell Transport Flashcard

Front

What is the main function of the cell membrane?

Back

To control the movement of substances in and out of the cell.

Front

What is active transport?

Back

The movement of substances across a cell membrane that requires energy, such as the sodium-potassium pump.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy, such as diffusion and osmosis.

Front

What happens to a cell in a hypotonic solution?

Back

The cell swells due to water entering the cell.

Front

What happens to a cell in a hypertonic solution?

Back

The cell shrinks due to water leaving the cell.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is the sodium-potassium pump?

Back

A type of active transport that moves sodium out of the cell and potassium into the cell.

Front

What is endocytosis?

Back

The process by which a cell takes in materials by engulfing them in a membrane.

Front

What is exocytosis?

Back

The process by which a cell expels materials by vesicles fusing with the membrane.