Obtaining and Removing materials

Front

What is the function of the cell membrane?

Back

To control what goes into and out of the cell.

Front

What is osmosis?

Back

The movement of water across a cell membrane from high concentration to low concentration.

Front

What do we call the process where particles move from high concentration to low concentration without using energy?

Back

Passive transport.

Front

What are protein doorways in the context of cell membranes?

Back

They are structures that allow large particles to pass through the cell membrane.

Front

True or False: In passive transport, particles always move from areas of high concentration to areas of low concentration.

Back

True.

Front

What is the main difference between passive transport and active transport?

Back

Passive transport does not require energy, while active transport does.

Front

What is diffusion?

Back

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

Front

What is the role of water in osmosis?

Back

Water moves across the cell membrane to balance concentrations on both sides.

Front

What happens to a cell in a hypertonic solution?

Back

The cell loses water and may shrink.

Front

What happens to a cell in a hypotonic solution?

Back

The cell gains water and may swell or burst.