Passive transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses proteins to help molecules pass through the cell membrane.

Front

What does it mean for a cell membrane to be semi-permeable?

Back

A semi-permeable membrane allows certain substances to pass while blocking others, controlling what enters and leaves the cell.

Front

What is diffusion?

Back

Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion 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 equilibrium in the context of cell transport?

Back

Equilibrium is the state where the concentration of substances is equal inside and outside the cell, resulting in no net movement.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, driving the movement of particles.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (ATP) to do so.

Front

What is the role of transport proteins in facilitated diffusion?

Back

Transport proteins assist in the movement of larger or polar molecules across the cell membrane that cannot pass freely.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion occurs directly through the membrane, while facilitated diffusion requires specific proteins to help transport molecules.