Cell Transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along a concentration gradient.

Front

Why is passive transport called 'passive'?

Back

It is called 'passive' because it occurs without the expenditure of energy.

Front

What is active transport?

Back

Active transport is the process by which cells use energy to move substances against their concentration gradient, from an area of low concentration to an area of high concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.

Front

What does a selectively permeable membrane do?

Back

A selectively permeable membrane allows certain substances to enter or leave the cell while keeping others out.

Front

What is the difference between passive and active transport?

Back

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

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, particularly in facilitated diffusion and active transport.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during diffusion.

Front

What is the significance of energy in active transport?

Back

Energy is required in active transport to move molecules against their concentration gradient, which is essential for maintaining cellular functions.