CO2 increases in which arteries during exercise? Veins (so mixed is +); also changes in oxygen and pH
Which body is controlled by oxygen? Peripheral (vs central CO2)
Increase in CO2 will cause vasodilation
Blood flow in the lungs and in the body are identical during rest  and exercise
At high-altitude the oxygen becomes about 60 instead of hundred With resulting respiratory alkalosis and metabolic acidosis
Differentiate between acute and chronic respiratory acidosis by the value of bicarbonate (ph low, co2 high, bicarc 30 cutoff acute/chronic)

The mucus from the trachea to the large airway is made by goblet cells
The surfactant in the terminal bronchioles is made by club cells
Beoynd terminal bronchioles the macrophages clear your system (2 um) this will activate the macrophages to secrete cytokines which should increase the growth factors (platelet and insulin)