COMPLETE SOLUTIONS
What are the 3 mechanisms for increasing venous return?
Skeletal muscle pump, respiratory pump, sympathetic vasoconstriction.
What are the 3 variables that regulate stroke volume?
Preload, afterload, contractility.
How do we regulate heart rate during exercise?
Increased sympathetic activity, decreased parasympathetic activity.
Where is the cv control center and where does it receive its information from?
Located in the medulla oblongata, receives information from baroreceptors and
chemoreceptors.
What are the 2 ways that the cvs responds to the increased demand for 02 during
exercise?
Increased cardiac output and redistribution of blood flow.
What are the phases of the heart and how do they change in response to
exercise?
Diastole and systole, diastole shortens and systole lengthens during exercise.
Why is exercise cardio-protective?
Improves cardiovascular function, reduces risk of heart disease.
Why does pressure drop across the arterials? How does this impact blood flow
during exercise?