Passive and Active Transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What is osmosis?

Back

Osmosis is a type of passive transport that specifically refers to the movement of water molecules through a selectively permeable membrane.

Front

What role does the cell membrane play?

Back

The cell membrane regulates what can enter and leave the cell, maintaining the internal environment.

Front

What is homeostasis?

Back

Homeostasis is the process by which a cell or organism maintains a stable internal environment despite changes in external conditions.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move substances across the cell membrane.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during diffusion.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion refers to the movement of any substance from an area of higher concentration to an area of lower concentration, while osmosis specifically refers to the movement of water.

Front

What is the energy requirement for passive transport?

Back

Passive transport requires no energy input; it relies on the natural movement of molecules.

Front

What is the energy requirement for active transport?

Back

Active transport requires energy, usually in the form of ATP, to move substances against their concentration gradient.