1. CARDIO-VASCULAR SYSTEM DURING EXERICISE
Anticipatory Rise – adrenaline is released prior to exercise
which increases heart rate and stroke volume
Movement (exercise) facilitates the skeletal muscular pump,
which increases venous return
Increased venous return increases stroke volume and heart
rate which together increase cardiac output (Q = SV x HR)
Chemoreceptors detect increases in CO2 in the blood and
stimulate the sympathetic nervous system to increase heart
rate and the force of muscular contraction (stroke volume)
The sympathetic nervous system helps in the redistribution of
blood flow through the vascular shunt mechanism. Some
arteries/arterioles vasodilate while others vasoconstrict
Baroreceptors help to regulate blood pressure through the
vasoconstriction and vasodilation of the blood vessels