Transport and Transport Systems

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  • Created by: riana1705
  • Created on: 03-05-16 18:51

1. Which of these is NOT an adaptation of alveoli?

  • A good blood supply.
  • A large surface area.
  • Very thick walls to protect themselves from high pressure.
  • Most lining for dissolving gases.
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2. What is osmosis?

  • The movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration.
  • The way in which large particles move across cell walls in the bloodstream.
  • The same as diffusion
  • The movement of water particles from an area to low concentration to an area of high concentration.

3. Where is active transport most likely to happen?

  • In the lungs, when blood is being oxygenated.
  • In the brain, when neurones are travelling the wrong way.
  • In the digestive system, when nutrients should be taken to the blood.
  • At the gym.

4. How does a cell which is short of water gain water from the surrounding tissue fluid?

  • Through diffusion.
  • Through osmosis.
  • Its cell wall/membrane will open to let the water inside.
  • Through active transport.

5. What is inside the lungs?

  • Alveoli - air sacs for gas exchange.
  • Capillaries - to carry the blood.
  • Villi - for gas exchange.
  • Air - for breathing.

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