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 certain substances enter and exit cells via diffusion through the cell membrane.
• Osmosis: Identify that water moves through partially permeable membranes via osmosis.
• Osmosis: Recognize that water enters and exits cells through the cell membrane by osmosis.
• Active transport: Explain active transport as 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: Discuss the significance of active transport in the movement of molecules or ions across cell membranes, including the uptake of ions by root hair cells.