The following table represents arterial pH and Respiratory gas composition in sea level, Everest base camp, Everest summit.

	Altitude (m)	Barometric pressure	inspired pO2	Alveolar pO2	ArterialpCo2	Arterial pH
Sea level	0	760	150	106	36	7.4
Everest Base camp	5400	404	75	51	20.4	7.6
Everest summit	8848	252	43	34	7.5	7.9

With the following values explain the difference in breathing regulation changes at the 3 altitudes. Also point out the role of central and peripheral chemoreceptors and their realtionship to pCaO2, minute ventilation and paO2