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 osmosis?

Back

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

Front

What is a selectively permeable membrane?

Back

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

Front

What happens to a cell placed in salt water?

Back

The cell will lose water and may shrink due to osmosis, as water moves out of the cell to the area of higher solute concentration (salt water).

Front

What is cytoplasm?

Back

Cytoplasm is the jelly-like fluid inside a cell that contains organelles and is mostly composed of water.

Front

What are macromolecules?

Back

Macromolecules are large, complex molecules, such as proteins, nucleic acids, carbohydrates, and lipids, that are essential for life.

Front

Why can't some molecules diffuse through a membrane?

Back

Some molecules, like macromolecules, cannot diffuse through a membrane because they are too large or polar to pass through the lipid bilayer.

Front

What is an example of an organic macromolecule?

Back

Starch is an example of an organic macromolecule, which is a carbohydrate made up of many glucose units.

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 and osmosis.

Front

What is equilibrium in the context of diffusion?

Back

Equilibrium is the state reached when the concentration of molecules is equal on both sides of a membrane, resulting in no net movement.