diffusion, osmosis, active transport

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the diffusion 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 active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP.

Front

How does temperature affect the rate of diffusion?

Back

Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas.

Front

What role do transport proteins play in active transport?

Back

Transport proteins facilitate the movement of substances across the cell membrane during active transport, often against the concentration gradient.

Front

Can diffusion occur in solids, liquids, and gases?

Back

Yes, diffusion can occur in solids, liquids, and gases, but it happens most rapidly in gases.

Front

What is the difference between passive transport 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 an example of osmosis in everyday life?

Back

An example of osmosis is when a cucumber is placed in salt water and loses water, becoming limp.