ANSWERS: 2
  • A will definitely increase heart rate so no. With B, a stroke occurs in the brain (other blockages have other names), the heart still pumps but no blood gets where it should go. C increased venous return would have do nothing but keep the heart pumping, increasing it, but not only at a normal rate. And D would be your answer since Vaginal discharge would have nothing to do with the heart.
  • A, B and C all increase cardiac output while D decreases it. So it's D. A - more frequent beats mean more blood pumped B - higher volume pumped per beat means more blood pumped overall C - increased venous return cause higher filling presure which, in turn, increases output via B D - parasympathic discharge causes decrease in heart rate so it goes against A, thus decreasing overall output

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