Diffusion & Facilitated Diffusion

Front

What is Passive Transport?

Back

The movement of particles with the concentration gradient, requiring no energy input.

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What is Diffusion?

Back

The free movement of particles across the membrane with the concentration gradient.

Front

What is Facilitated Diffusion?

Back

A type of passive transport that requires a membrane-spanning protein to help move particles across the membrane.

Front

What is Active Transport?

Back

The movement of substances against the concentration gradient, requiring energy input.

Front

What is Concentration?

Back

The relative amount of a given substance contained within a solution or in a particular volume of space.

Front

What is a Concentration Gradient?

Back

The difference in concentration of a substance across a space.

Front

What role do membrane-spanning proteins play in facilitated diffusion?

Back

They help transport specific substances across the cell membrane without using energy.

Front

What is the difference between passive transport and active transport?

Back

Passive transport moves substances with the concentration gradient without energy, while active transport moves substances against the gradient using energy.

Front

Can water molecules diffuse through the cell membrane?

Back

Yes, water can diffuse through the cell membrane via osmosis, a type of passive transport.

Front

What is Osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.