Diffusion through a Membrane State Lab

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What direction does oxygen move if there is more oxygen in the blood than in an organ?

Back

Oxygen moves out of the blood.

Front

What is the main difference between starch and glucose?

Back

The main difference is size; starch is a larger molecule compared to glucose.

Front

What type of molecules can easily diffuse through a cell membrane?

Back

Small, nonpolar molecules can easily diffuse through a cell membrane.

Front

What is a selectively permeable membrane?

Back

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

Front

What happens to water during osmosis?

Back

Water moves from an area of high concentration to an area of low concentration.

Front

True or False: Diffusion requires energy to occur.

Back

False; diffusion is a passive process that does not require energy.

Front

Which molecule did not diffuse through the membrane in the lab experiment?

Back

Starch did not diffuse through the membrane.

Front

What is the role of concentration gradients in diffusion?

Back

Concentration gradients drive the movement of molecules from areas of high concentration to areas of low concentration.