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Lecture 3

Lecture Three notes

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Department
Biology
Course
BIO2110
Professor
All Professors
Semester
Spring

Description
Lecture ThreethMIDTERM FEB 13 Gas TransportSteady state oRate o2 consumptionrate o2 added to blood at lungsoRate co2 produced equals rate co2 leaves blood at lungsGas diffuses from high partial pressure to low oDelta po2 drives o2From alveoli to bloodFrom blood to tissueoDelta pco2 drives O2 TransportLarger animals use circulatory systemsTransport of gasses in blood Solubility of oxygen in aqeuos fluids is low Metalloproteins respiratory pigmentsoProteins containing metal ions which reversibly bind with o2oIncrease o2 carrying capacity 50 fold oHaemoglobinFound in blood cellsMost vertabrates Oxygen is transported in the bloodoDissolved plasms2oReversibly combined with haemoglobin98oxygenation Haemoglobin has 4 identical subunits each with a heme group containing iron hb can carry 4 o2 molecules
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