Question 10
2 pts
The purpose of this question is to review how the Frank Starling Law of the Heart applies to
cardiovascular function and cardiovascular responses to exercise.
Select all of the following that apply to/are correct regarding the Frank Starling Law of the
Heart
During exercise, preload increases, and with the greater end diastolic volume contractile cardiac
myocyte sarcomeres are stretched to an optimum length for generating force
Sympathetic constriction of veins, the muscle pump and the thoracic pump all contribute to
increased venous return and the Frank Starling mechanism for increasing SV
Optimal sarcomere length facilitates increasing contractile element sensitivity to calcium at longer
lengths and decreasing sensitivity at short lengths. This means more binding and force of contraction
when the sarcomeres are stretched, but also aids in relaxation after force generation
Frank Starling is actually a unique species of hotdog eating bird and has nothing to do with
ventricular responses to exercise, and increased SV to facilitate increased CO
