Diffusion & Facilitated Diffusion Practice

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the movement of particles across a cell membrane through protein channels, following the concentration gradient.

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane without the use of energy, moving with the concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient occurs when the concentration of particles is higher in one area than in another.

Front

What is the main difference between diffusion and facilitated diffusion?

Back

The main difference is that facilitated diffusion requires the use of protein channels, while simple diffusion does not.

Front

Does passive transport require energy?

Back

No, passive transport does not require energy.

Front

What type of molecules typically use facilitated diffusion?

Back

Large or polar molecules, such as glucose and ions, typically use facilitated diffusion.

Front

What role do protein channels play in facilitated diffusion?

Back

Protein channels provide a pathway for specific molecules to cross the cell membrane during facilitated diffusion.

Front

What is the direction of movement in facilitated diffusion?

Back

In facilitated diffusion, molecules move from an area of higher concentration to an area of lower concentration.

Front

Can facilitated diffusion occur against the concentration gradient?

Back

No, facilitated diffusion cannot occur against the concentration gradient; it only occurs with the gradient.

Front

What is an example of a substance that uses facilitated diffusion?

Back

Glucose is an example of a substance that uses facilitated diffusion to enter cells.