Cell transport

Front

What is Active Transport?

Back

Active Transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).

Front

What is Passive Transport?

Back

Passive Transport is the movement of molecules across a cell membrane without the use of energy, moving from an area of high concentration to an area of low concentration.

Front

Define Osmosis.

Back

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

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of particles.

Front

What is facilitated diffusion?

Back

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

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell takes in materials by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane.

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

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion is the movement of small or nonpolar molecules directly through the membrane, while facilitated diffusion requires specific transport proteins for larger or polar molecules.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.