Cell membrane and passive transport

Front

What does Passive Transport mean?

Back

No energy is used.

Front

Why can't Molecule A diffuse?

Back

Molecule A is a macromolecule and it is too large to move.

Front

What is the hydrophobic region of the cell membrane?

Back

The hydrophobic region is the part of the membrane that repels water, typically composed of fatty acid tails.

Front

What role does cholesterol play in the plasma membrane?

Back

Cholesterol prevents the fatty acid tails from sticking together.

Front

Which direction do water molecules move during osmosis when a cell is in a hypertonic solution?

Back

Out of the cell, so the cell shrinks.

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

Define diffusion.

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What are the components of the cell membrane?

Back

Phospholipids, proteins, cholesterol, and carbohydrates.

Front

What is a selectively permeable membrane?

Back

A membrane that allows certain molecules to pass while blocking others.