Other questions in this quiz

2. what does the thick outer wall of arteries (collagen) do

  • recoil, which allows normal conditions to return after contraction
  • ensure that there is thick outer walls to protect them from bursting due to high pressure
  • contract and increase blood pressure
  • ensure it is smooth to allow efficient blood flow

3. why are cappilary walls very thin (only one cell thick)

  • to allow oxygen and food to diffuse into cells and waste to diffuse out of cells
  • because the blood is at a low pressure
  • because it doesn't carry a lot of blood

4. what does the lumen do

  • ensure it is smooth to allow efficient blood flow
  • recoil, which allows normal conditions to return after contraction
  • ensure that there is thick outer walls to protect them from bursting due to high pressure
  • contract and increase blood pressure

5. why are long term drug trials useful

  • to ensure that the drug is safe and that it works. it also is used to identify any long-term side affects that don't happen imediately
  • because they show any humans that don't like it
  • because it shows whether the drug is available for long-term use (supply)

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