Unit 2: Cells and Transport Review

Front

The movement of molecules from higher concentration to lower concentration is called?

Back

Diffusion

Front

What is facilitated diffusion?

Back

Transport that uses proteins to help move molecules across the membrane.

Front

A cell in a hypotonic solution will:

Back

Swell as water enters the cell.

Front

Which of the following are types of passive transport?

Back

Osmosis, Facilitated Diffusion, Diffusion - All of these.

Front

Which organelle functions to remove excess water in many protists?

Back

Contractile vacuole.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

Define active transport.

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What is the role of the cell membrane?

Back

To protect the cell and regulate what enters and leaves.

Front

What is tonicity?

Back

The ability of a solution to affect the shape of a cell by altering its internal water volume.

Front

What happens to a cell in a hypertonic solution?

Back

It shrinks as water leaves the cell.