KP322 Chapter Notes - Chapter 24: Vascular Endothelial Growth Factor, Red Blood Cell, Stroke Volume
11 Dec 2017
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Measure of the weight of the column of air directly over that spot. Decreases with increasing altitude: air is less dense, each litre of air contains few molecules of gas. Decrease in the partial pressure of o2 with increasing altitude has a direct effect on the saturation of the hemoglobin, and consequently, oxygen transport. Performance improved in all but one case: density of the air at altitude offers less resistance to movements at high speeds, as (cid:449)ell as (cid:374)or(cid:373)al (cid:858)gai(cid:374)s(cid:859) (cid:373)ade fro(cid:373) (cid:373)(cid:455) ol(cid:455)(cid:373)pi(cid:272)s to the (cid:374)e(cid:454)t. Dependent on oxygen delivery, therefore affected by the lower po2 at altitude: cause a decrease in hemoglobin saturation and vo@ Performance diminished at all distances but the 1500m run. Vo2max decreases in a linear fashion with altitude. Each litre of blood is carrying less oxygen, therefore more litres of blood must be pumped per minute in order to compensate increased hr response: sv decrease already (above), so hr must compensate.
