Chapter 16, Problem 15RA

During exercise, which of these statements is true?

$\begin{array}{l}\text{a}\text{. The arterial percent oxyhemoglobin saturation is decreased}\text{.}\hfill \\ \text{b}\text{. The venous percent oxyhemoglobin saturation is decreased}\text{.}\hfill \\ \text{c}{\text{. The arterial Pco}}_{\text{2}}\text{ is measurably increased}\text{.}\hfill \\ \text{d}\text{. The arterial pH is measurably decreased}\text{.}\hfill \end{array}$