What does the Frank-Starling Law state about cardiac physiology?
a. that the left and right atria contract in unison, as do the left and right ventricles
b. that end-diastolic volume significantly affects stroke volume by causing greater stretch and greater contractile force on the myocardium
c. that cardiac output is a result of stroke volume and heart rate
d. that maximal effort can increase cardiac output by five to six-fold than at rest
Answer: B