Passive Diffusion 1/9

Front

What is passive diffusion?

Back

Passive diffusion is the movement of molecules from an area of high concentration to an area of low concentration without the use of energy.

Front

What is a hypertonic solution?

Back

A hypertonic solution is one where the concentration of solutes is higher outside the cell than inside, causing water to move out of the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one where the concentration of solutes is lower outside the cell than inside, causing water to move into the cell.

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

Front

In diffusion, materials move from areas of _____________ concentration to areas of _____________ concentration.

Back

high, low

Front

What is the primary driving force behind passive diffusion?

Back

The concentration gradient, which is the difference in concentration of a substance between two areas.

Front

What is the difference between passive transport and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

Give an example of a substance that commonly moves via passive diffusion.

Back

Oxygen (O2) moves into cells via passive diffusion.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and may shrivel due to the higher concentration of solutes outside the cell.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will gain water and may swell or burst due to the lower concentration of solutes outside the cell.