Honor's Bio: Membrane Transport

Front

What is the process called when water moves across a cell membrane?

Back

Osmosis

Front

What type of transport occurs when molecules move from an area of high concentration to an area of low concentration?

Back

Diffusion

Front

What is the main difference between passive and active transport?

Back

Passive transport does not require energy, while active transport does.

Front

What type of molecules typically use osmosis to cross a membrane?

Back

Water molecules.

Front

In which direction do molecules move during diffusion?

Back

From high concentration to low concentration.

Front

What is a semi-permeable membrane?

Back

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

Front

What is the energy requirement for passive transport?

Back

Passive transport uses no energy.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will gain water and may swell or burst.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to help move molecules across the membrane.