Diffusion & Osmosis

Front

What is Selective Permeability?

Back

The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.

Front

What is diffusion?

Back

The movement of molecules from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

The movement of water across a membrane.

Front

What happens to a red blood cell in a hypotonic solution?

Back

The osmotic direction of water is greater entering the cell.

Front

During osmosis, what direction does water move?

Back

Water moves from high to low concentration.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion refers to the movement of all types of molecules, while osmosis specifically refers to the movement of water.

Front

What is an isotonic solution?

Back

A solution where the concentration of solutes is the same inside and outside the cell, resulting in no net movement of water.

Front

What is active transport?

Back

The movement of materials across a cell membrane that requires energy from the cell.

Front

What is a concentration gradient?

Back

A difference in the concentration of a substance across a space.

Front

What role do cell membranes play in diffusion?

Back

Cell membranes are selectively permeable, allowing certain substances to pass while blocking others.