Biology Honors: Ch 3B Cell Membrane Structure & Function

Front

What is the ideal tonicity for a plant cell?

Back

Hypotonic

Front

How many sodium ions are transported out of the sodium-potassium pump?

Back

3

Front

What type of transport uses channel proteins to move molecules from higher to lower concentrations?

Back

Facilitated Diffusion

Front

What does it mean when a membrane is described as selectively permeable?

Back

Some molecules can cross the membrane while others cannot.

Front

What is the process called when large particles are released from the inside of the cell to the outside?

Back

Exocytosis

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

What is the difference between passive and active transport?

Back

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

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What role do phospholipids play in the cell membrane?

Back

They form the bilayer structure of the membrane.

Front

What is the function of transport proteins in the cell membrane?

Back

To facilitate the movement of substances across the membrane.