A 31-year-old woman goes for a 15-mile run. She does not drink water during this time. Following the run, considerable perspiration is observed. She then rests for 15 minutes without drinking water. Which of the following is most likely to be seen in this patient?
Decreased filtration fraction
Decreased urinary protons
Increased carotid sinus baroreceptor firing rate
Increased potassium secretion
Increased 1α-hydroxylase activity
