Question

what happened to the respiratory process in a man going up a hill

Answer 1

the level of oxygen dissolving in blood decrease as a result person nose starting to bleed . at height the atmospheric pressure is low so oxygen cannot able to dissolve properly in blood and person causes nose bleeding. on Ground level the atmospheric pressure is Normal for oxygen to get dissolve in blood.

Answer 2

As altitude increases, the oxygen level in the atmosphere decreases. Therefore, as a man goes uphill, he gets less oxygen with each breath. This causes the amount of oxygen in the blood to decline. The respiratory rate increases in response to the decrease in the oxygen content of blood.