Flashcard - Cell Membrane

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is facilitated diffusion?

Back

A process that uses proteins to help move molecules across a membrane without using energy.

Front

What is active transport?

Back

The movement of molecules across a membrane that requires energy.

Front

What are the three types of passive transport?

Back

Diffusion, osmosis, and facilitated diffusion.

Front

What does hypotonic mean?

Back

A solution with lower concentration of solutes outside the cell than inside, causing water to move into the cell.

Front

What does isotonic mean?

Back

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

Front

What does hypertonic mean?

Back

A solution with higher concentration of solutes outside the cell than inside, causing water to move out of the cell.

Front

What is the role of the cell membrane?

Back

To protect the cell and control what enters and exits the cell.

Front

What is diffusion?

Back

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

Front

What is a selectively permeable membrane?

Back

A membrane that allows certain molecules to pass through while blocking others.