BIO220H1 Lecture : respiratory system 1

• School: UTSG
• Department: Biology
• Course: BIO220H1
• Professor: Matthews

Document Summary

Co2 in mouth = 0 > 0/100 x 747 47 = 0. Pressure in mouth pico2 = 0 mm hg. But mitochondria relaease c02 in mouth = 46 mm hg. 46 mm hg move from blood stream into lung = 40 mm hg >> mouth. 46-40 mm hg less than o2 = 60 mmhg. Co2 == magic molecule == move readily no need much pressure fr. Each of us set pt. of c02 hold co2 and establish pressure : co2 in alveolar vol. same to arterial blood . Lung expand get air in surfactant released by alveolar cells that inc. distensibility of lung so not too difficult for lung to open up and facilitates breathing w/out it serious situation www. notesolution. com. Mitochondria blood cell combine h2o to form carbonic acid. H2co4 in blood but - -- rbc more responsive (contain carbonic anhydrase) picks up action considerably use rbc as sink of co2.