Cell Transport

Front

What is osmosis?

Back

Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration across a semipermeable membrane.

Front

What is passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, typically against a concentration gradient (from low to high concentration).

Front

What role does the cell membrane play in transport?

Back

The cell membrane controls the movement of substances in and out of the cell, acting as a barrier and a gatekeeper.

Front

What is a carrier protein?

Back

A carrier protein is a type of protein that transports specific substances across a cell membrane by changing shape.

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 diffusion?

Back

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

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space or membrane.

Front

What is facilitated diffusion?

Back

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

Front

What is the significance of ATP in active transport?

Back

ATP provides the energy required for active transport to move molecules against their concentration gradient.