Movement into and out of cells

Topics

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Sample objectives

What this unit covers

• Diffusion: Explain diffusion as the overall movement of particles from areas of higher concentration to areas of lower concentration due to their random motion.
• Diffusion: Identify that the energy driving diffusion originates from the kinetic energy of molecules and ions in random motion.
• Osmosis: Explain how water functions as a solvent in living organisms, particularly in relation to digestion, excretion, and transportation.
• Osmosis: Identify that water moves through partially permeable membranes via osmosis.
• Active transport: Active transport is the process where particles move through a cell membrane from an area of lower concentration to an area of higher concentration, which requires energy from respiration.
• Active transport: Active transport is crucial for the movement of molecules or ions across cell membranes, such as how root hairs absorb ions.