Active & Passive Transport

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What does 'selectively permeable' mean?

Back

The membrane allows some substances to pass through while keeping others out.

Front

What is active transport?

Back

The movement of substances across a cell membrane against their concentration gradient, requiring energy.

Front

What is passive transport?

Back

The movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses channel proteins to help move substances across the membrane.

Front

What is endocytosis?

Back

A form of active transport where the cell engulfs substances to bring them inside.

Front

What is exocytosis?

Back

A form of active transport where substances are expelled from the cell.

Front

What is phagocytosis?

Back

A type of endocytosis known as 'cell eating', where the cell engulfs large particles.

Front

What is pinocytosis?

Back

A type of endocytosis known as 'cell drinking', where the cell engulfs small particles or liquids.

Front

What is a concentration gradient?

Back

The difference in concentration of a substance across a space.