Cell Unit Review

Front

What forms the channels and pumps in the phospholipid bilayer?

Back

Proteins

Front

What happens to cells in hypertonic solutions?

Back

Cells shrink.

Front

Which substances move into/out of a cell via simple diffusion between the phospholipids?

Back

Oxygen and carbon dioxide.

Front

How do big substances move into the cell?

Back

Through endocytosis.

Front

What is the hydrophobic region of the cell membrane?

Back

The part of the membrane that repels water, typically made of fatty acid tails.

Front

What is the function of the phospholipid bilayer?

Back

It acts as a barrier to protect the cell and regulates what enters and exits.

Front

Define osmosis.

Back

The movement of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is facilitated diffusion?

Back

The process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What role do carbohydrates play in the cell membrane?

Back

They are involved in cell recognition and signaling.

Front

What is the difference between endocytosis and exocytosis?

Back

Endocytosis is the process of taking substances into the cell, while exocytosis is the process of expelling substances from the cell.