Diffusion Through a Membrane

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until they are evenly distributed.

Front

What is the role of the cell membrane in diffusion?

Back

The cell membrane acts as a selective barrier that allows certain substances to diffuse in and out of the cell while blocking others.

Front

What types of molecules can easily diffuse through the cell membrane?

Back

Small, nonpolar molecules like oxygen and carbon dioxide can easily diffuse through the cell membrane.

Front

What is a wet mount slide?

Back

A wet mount slide is a laboratory technique used to prepare a specimen for microscopic examination by placing it in a drop of liquid.

Front

What is the starch indicator test used for?

Back

The starch indicator test is used to detect the presence of starch in a solution, turning blue-black in its presence.

Front

What color does the iodine indicator turn in the presence of starch?

Back

The iodine indicator turns blue-black when it comes in contact with starch.

Front

What is the purpose of the Benedict's test?

Back

The Benedict's test is used to detect the presence of reducing sugars, such as glucose, in a solution.

Front

What color change indicates a positive result in the Benedict's test?

Back

A positive result in the Benedict's test is indicated by a color change to orange-red.

Front

Which substance does not diffuse through a cell membrane?

Back

Starch does not diffuse through a cell membrane due to its large molecular size.

Front

What is osmosis?

Back

Osmosis is a specific type of diffusion that involves the movement of water molecules across a selectively permeable membrane.