Cell Transport Semester Test Review

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

Give an example of osmosis in plants.

Back

A plant's roots use osmosis to absorb water from the soil.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

Front

How does diffusion differ from active transport?

Back

Active transport requires energy from the cell to move substances against their concentration gradient, while diffusion does not require energy.

Front

What happens to cells placed in a strong salt solution?

Back

Water will move from the cells to the salt solution, causing the cells to shrink.

Front

Is diffusion a passive or active process?

Back

Diffusion is a passive process.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas.

Front

What is a selectively permeable membrane?

Back

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

Front

What is the role of energy in active transport?

Back

Energy is used in active transport to move substances against their concentration gradient.

Front

What is an example of active transport?

Back

The sodium-potassium pump is an example of active transport, moving sodium ions out of the cell and potassium ions into the cell.