Cell Transport

Front

What role do proteins play in the cell membrane?

Back

They act as channels and carriers for molecules.

Front

Does facilitated diffusion require any energy?

Back

No.

Front

Facilitated diffusion and protein pumps are similar because:

Back

They both involve the movement of molecules through proteins.

Front

Which biomolecule makes up MOST of the cell membrane?

Back

Phospholipids.

Front

What is the primary function of cholesterol in the cell membrane?

Back

To stabilize the membrane structure.

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is the function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

What is passive transport?

Back

The movement of molecules across the cell membrane without the use of energy.

Front

What is active transport?

Back

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

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.