Biology 9700 · AS & A Level · The microscope in cell studies

The microscope in cell studies — practice question

When a doctor or nurse draws a blood sample from a person, a needle is used to enter a vein rather than an artery. Which reasons account for veins being used?

  • A1, 2, 3 and 4
  • B1, 2 and 3 only
  • C1, 2 and 4 only
  • D3 and 4 only

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