Biology - Osmosis/Diffusion

Front

What is osmosis?

Back

Osmosis is the movement of water 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 movement of particles 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 process by which substances move across cell membranes with the assistance of special proteins called channel proteins.

Front

What is active transport?

Back

Active transport is the energy-requiring process that moves material across a cell membrane against a concentration gradient, using ATP.

Front

What does it mean if a membrane is permeable?

Back

If a membrane is permeable, it means that substances can pass through it.

Front

What is a concentration gradient?

Back

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

Front

What role do channel proteins play in cellular transport?

Back

Channel proteins facilitate the movement of specific molecules across the cell membrane during facilitated diffusion.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is the significance of ATP in active transport?

Back

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

Front

How does water move during osmosis?

Back

Water moves from an area of high water concentration (or low solute concentration) to an area of low water concentration (or high solute concentration).