Transport in Cells

• What is the process of osmosis?

  Movement of water from high to low concentration
• What is the main function of the cell membrane in transport?

  To allow certain substances to pass in and out of the cell
• What is diffusion?

  The movement of molecules from high concentration to low concentration
• What type of transport requires energy from the cell?

  Active transport
• What is the main difference between active and passive transport?

  Active transport moves molecules against the concentration gradient
• In which type of transport do molecules move with the concentration gradient?

  Diffusion
• Which of the following molecules can pass through the cell membrane via simple diffusion?

  Oxygen
• What is facilitated diffusion?

  The movement of molecules through a membrane protein down their concentration gradient