Which of the following parameters is decreased during moderate exercise?

Question

Quizplus · Accepted Answer

[IX B]. In anticipation of exercise, the central command increases sympathetic outflow to the heart and blood vessels, causing an increase in heart rate and contractility. Venous return is increased by muscular activity and contributes to an increase in cardiac output by the Frank-Starling mechanism. Pulse pressure is increased because stroke volume is increased. Although increased sympathetic outflow to the blood vessels might be expected to increase total peripheral resistance (TPR), it does not because there is an overriding vasodilation of the skeletal muscle arterioles as a result of the buildup of vasodilator metabolites (lactate, $\mathrm{K}^{+}$adenosine). Because this vasodilation improves the delivery of $\mathrm{O}_{2}$, more $\mathrm{O}_{2}$ can be extracted and used by the contracting muscle.

Which of the Following Parameters Is Decreased During Moderate Exercise O2\mathrm{O}_{2}O2​

Which of the Following Parameters Is Decreased During Moderate Exercise $\mathrm{O}_{2}$