True or false
if the answer is false, explain why it is false
the end diastolic volume (edv), ventricular volume at the end of diastole, varies with demand and is the minimum volume of the heart cycle.

You have trained year for a marathon. in your first attempt to run a marathon, you decide that you want to complete this 26-mile race in 4-5 hours. a. what is the length of a marathon in kilometers (1mile= 1.6 kilometers). b. what would your average speed have to be to complete the race 4.5 hours? give your answer in kilometers per hour.