Transport across cell membrane

• What controls the entry and exit of materials? Cell membrane
• What are the two main components of the cell membrane?

  Proteins and phospholipids
• What term describes the cell membrane which allows some substances to pass through?

  Selectively permeable
• Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until evenly spread
• Diffusion is an example of what transport?

  Passive transport
• Diffusion is passive transport because it goes down a concentration gradient and doesn't require energy
• Osmosis is the movement of water molecules from a high water concentration to a low water concentration
• Osmosis is an example of what transport?

  Passive transport
• Osmosis is passive transport because it moves down a water concentration gradient and doesn't require energy
• When a plant cell is placed in a strong salt solution, water moves out of the vacuole and shrinks the cytoplasm pulls away from cell wall and becomes?


  Plasmolysed
• When a plant cell is placed in pure water, water moves in the vacuole it swells and the cytoplasm presses against the cell wall and becomes?

  Turgid
• When an animal cell is placed in a strong salt solution, water moves out and?

  Shrinks
• When an animal cells is placed in pure water, water moves out and?

  Bursts
• Active transport is the movement of molecules from an area of low concentration to an area of high concentration
• Active transports moves against the concentration gradient and does require energy