Diffusion Flashcard

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is the direction of solute movement in simple diffusion?

Back

Solute molecules move from high concentration to low concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What type of molecules can pass through the membrane via simple diffusion?

Back

Small and nonpolar molecules can pass through the membrane via simple diffusion.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which solute molecules pass through the cell membrane with the help of integral proteins.

Front

What type of transport requires integral proteins?

Back

Facilitated diffusion and active transport require integral proteins.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion does not require proteins and allows small, nonpolar molecules to pass, while facilitated diffusion requires integral proteins for larger or polar molecules.

Front

What type of transport allows large, charged, or polar molecules to pass through the membrane?

Back

Facilitated diffusion allows large, charged, or polar molecules to pass through the membrane.

Front

What is the role of integral proteins in facilitated diffusion?

Back

Integral proteins provide a pathway for specific molecules to cross the cell membrane.

Front

Does facilitated diffusion require energy?

Back

No, facilitated diffusion does not require energy; it relies on the concentration gradient.