Biology 5090 · O Level · Blood vessels

Blood vessels — practice question

Raynaud’s syndrome is a condition that may be set off by stress. It makes the hands and feet respond as though they were exposed to extreme cold. What reaction will occur in the hands and feet of a person with Raynaud’s syndrome?

  • Avasoconstriction - blood vessels at the skin surface narrow, reducing blood flow
  • Bvasoconstriction - blood vessels at the skin surface widen, increasing blood flow
  • Cvasodilation - blood vessels at the skin surface narrow, reducing blood flow
  • Dvasodilation - blood vessels at the skin surface widen, increasing blood flow

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