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)    

  Which type of muscle cell exhibits a longer refractory period?  

  Blood flow is….   (hint: use the equation we learned in class… F = ? )  

  The pericardial cavity is between the….  

  Angiotensin II causes  

  Which valve prevents the back flow of blood from arteries into the left ventricle when the ventricles relax?  

  Gas, nutrient, and waste exchange occur between the ________ and the tissues of the body.  

  (EASY… don’t think hard on this one) During a cardiac cycle, how many of the four chambers contract at any one time?  

  At the AV node of the conduction system, the action potential is….  

An example of a “check” the President has on Congress is