Transport in Cells

Front

What is active transport?

Back

Active transport is the process by which cells move molecules from an area of low concentration to an area of high concentration, requiring energy.

Front

What is passive transport?

Back

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

Front

What is the primary difference between active and passive transport?

Back

Active transport requires energy to move molecules against the concentration gradient, while passive transport does not require energy and moves molecules with the gradient.

Front

What happens to a red blood cell in distilled water?

Back

The red blood cell will swell and burst due to the influx of water.

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 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 facilitated diffusion?

Back

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

Front

What is endocytosis?

Back

Endocytosis is an active transport process where cells engulf substances into a pouch, which then becomes a vesicle inside the cell.

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 is a concentration gradient?

Back

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