Practice Quiz

NREMT Advanced EMT Practice Test #3

Category - EMT-I/99

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In order to eject blood, what must the heart overcome?
  1. Oxygen overload
  2. Carbon Dioxide increases
  3. Afterload
  4. All of the above
Explanation
Answer - C - In order to eject blood, the heart must overcome afterload. Afterload is the amount of resistance against which the heart must pump. The heart must overcome this resistance in order to eject blood. Afterload is determined by the degree of peripheral vascular resistance. Peripheral resistance is determined by the degree of vasoconstriction present on the arterial side.
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