Practice Quiz

NREMT Paramedic

Category - Medical

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The precapillary sphincters close during what stage of shock?
  1. Hyperactive phase
  2. Hypoactive phase
  3. Ischemic phase
  4. None of the above
Explanation
Answer: C - The precapillary sphincters close during the ischemic stage of shock. Additionally, the arteriovenular shunt opens and the post capillary venules close. This allows the blood to be directed away from the capillary bed and back into the core circulation.
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