Kinesiology 2230A/B Lecture Notes - Lecture 15: Lynne Cox, Myoglobin, Partial Pressure
14 Mar 2018
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Po2,pco2, diffusion is proportional to solubility (co2 - diffuses =~ 19x"s faster than o2) Average female 12-16g hb/100ml blood (=~ 13% difference between sexes) About 3ml of o2 are dissolved per liter of plasma. 2% of the total o2 is dissolved in blood (po2) Hemoglobin is offloading the oxygen but the myoglobin"s affinity is still high so it will pick that up. Myoglobin (muscle) picks up because it"s affinity is higher at a particular partial pressure. The differences in affinity is what enables you to transfer oxygen into the muscle. Significant portion of myoglobin is iron which is red, so the more red the better the myoglobin or oxygen stores. Has extremely high concentration of myoglobin allowing them to dive for 20,30,40 minutes without needing to come up for air. When low ph occurs oxyhemoglobin concentrations are going to lower at all partial pressures (h+ increases)
