Active Transport

Front

What is active transport?

Back

Active transport is the movement of particles across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane without the use of energy, typically from a region of higher concentration to a region of lower concentration.

Front

What is the main difference between active and passive transport?

Back

Active transport requires energy (ATP) to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What role does ATP play in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

Give an example of active transport in cells.

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which can drive the movement of substances during transport.

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 without using energy.

Front

What is the significance of transport proteins in active transport?

Back

Transport proteins are essential in active transport as they help move specific substances across the cell membrane against their concentration gradient using energy.