2.3 Cell Transport

Front

What is osmosis?

Back

Osmosis is the movement 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 passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient (from low to high concentration) which requires energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a cell membrane through protein channels, moving from high to low concentration.

Front

What role does the cell membrane play in homeostasis?

Back

The cell membrane controls what substances can enter or leave the cell, helping to maintain homeostasis.

Front

What is the concentration gradient?

Back

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

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell engulfs material from its environment, bringing it into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials to the outside environment, often using vesicles.

Front

What is simple diffusion?

Back

Simple diffusion is the movement of small or nonpolar molecules directly through the phospholipid bilayer of a cell membrane from high to low concentration.