Diffusion & Osmosis Flashcard

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is the primary function of cell membranes?

Back

To regulate what enters and exits the cell.

Front

What types of molecules are found in cell membranes?

Back

Phospholipids, proteins, and cholesterol.

Front

What happens to frog eggs placed in saltwater?

Back

Water will leave the eggs due to osmosis.

Front

How would you describe a cell membrane's permeability?

Back

Selectively permeable, allowing certain substances to pass while blocking others.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What is equilibrium in the context of diffusion?

Back

A state where the concentration of molecules is equal throughout a space.

Front

What role do proteins play in cell membranes?

Back

They assist in transport, act as receptors, and provide structural support.

Front

What is the significance of phospholipids in cell membranes?

Back

They form the bilayer structure, providing a barrier to most water-soluble substances.