Transport: Passive vs Active

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration until they are evenly distributed.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from an area of low concentration to an area of high concentration, requiring energy.

Front

What does 'semi-permeable' mean?

Back

Semi-permeable refers to a membrane that allows certain particles to pass through while blocking others.

Front

What is the main difference between passive and active transport?

Back

The main difference is that passive transport does not require energy, while active transport does.

Front

In passive transport, molecules move from an area of __________ concentration to an area of __________ concentration.

Back

high, low

Front

Does passive transport require energy?

Back

No, passive transport does not require energy.

Front

What is an example of diffusion in everyday life?

Back

An example of diffusion is the smell of perfume spreading in a room.

Front

What role do carrier proteins play in active transport?

Back

Carrier proteins help transport molecules across the cell membrane against their concentration gradient, using energy.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.