Diffusion Through a Membrane

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is a selectively permeable membrane?

Back

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

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane.

Front

What is the role of the cell membrane in diffusion?

Back

The cell membrane regulates the movement of substances in and out of the cell, facilitating diffusion.

Front

What is the significance of concentration gradient in diffusion?

Back

The concentration gradient is the difference in concentration of a substance between two areas, driving the diffusion process.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is the starch indicator test?

Back

The starch indicator test uses iodine to detect the presence of starch, turning blue-black in its presence.

Front

Why can't starch diffuse through a membrane?

Back

Starch is a macromolecule and is too large to pass through the pores of a selectively permeable membrane.

Front

What color indicates a positive test for glucose using Benedict's solution?

Back

A positive test for glucose using Benedict's solution will turn brick red.