What happens to blood pressure?
Blood pressure (mmHg) = Cardiac output (lpm) x Total peripheral resistance.
Intrisinc and Extrinsic factors affect resistance:
Increased metabolites results in vasodilation, which decreases TPR
Increased sympathetic activity releases noradrenaline which causes vasoconstriction, and thus increases TPR
Increased sympathetic activity releases adrenaline which results in vasodilation, thus decreasing TPR
Overall, there is a decrease in TPR
Systolic pressure increases as the increase of cardiac output is greater than the decrease of TPR