Which of the following will impair cardiac output?

Which of the following will impair cardiac output?
 
  A) Improperly functioning valves
  B) Increased perfusion to the heart
  C) Elevated blood pressure
  D) Increase in mean arterial pressure

Question 2

The tricuspid valve prevents blood from:
 
  A) moving between the right and left ventricles.
  B) flowing from the right ventricle into the right atrium.
  C) bypassing the pulmonary vessels and entering the right heart.
  D) flowing backward through the left atrium.

Question 3

Which of the following vessels has the least ability to constrict?
 
  A) Arterioles
  B) Venules
  C) Aorta
  D) Vena cava