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  Cardiac output (CO) is the amount of blood that is pumped….  

  Which action leads to the closure of the right atrioventricular (AV) valve?  

Why does velocity dip as we go from the elastic arteries to the muscular arteries to the arterioles and then to the capillaries?

  Which can be used to characterize blood flow in the human body?   (NOTE:  check ALL that apply to the statement above…. could be zero, one, or multiple answers)    

  Reduction in the lumen diameter of a blood vessel as the smooth muscle contracts is known as __________.  

  Which statement accurately describes total blood flow?  

  Which part of the circulatory system holds the largest amount of blood?  

  What is the sequence of events in the transmission of an impulse through the heart muscle?  

  The velocity of blood is slowest in the capillaries and pressure of blood is lowest in the veins.   Which of the following is NOT an accurate description of the benefits of slow, low pressure blood in the capillary beds?  

  (another TOUGH ONE… think about the movement of ions) During the plateau phase of a cardiac muscle cell’s action potential, the membrane stays….