Passive Transport

Front

What is Osmosis?

Back

The diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration.

Front

What is the main molecule that makes up the cell membrane?

Back

Phospholipids.

Front

What is Selective Permeability?

Back

The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.

Front

When the solute concentration is higher OUTSIDE of the cell, which way will water move?

Back

Molecules of water will move OUT of the cell.

Front

What regulates what enters and leaves a cell?

Back

Cell Membrane.

Front

Define Passive Transport.

Back

The movement of substances across a cell membrane without the use of energy.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of particles from an area of high concentration to an area of low concentration, while osmosis specifically refers to the movement of water.

Front

What is a semi-permeable membrane?

Back

A membrane that allows certain molecules or ions to pass through it by diffusion and occasionally by facilitated diffusion.

Front

Give an example of a substance that moves via passive transport.

Back

Oxygen and carbon dioxide move across cell membranes by diffusion.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink.