KINE 3012 Lecture Notes - Lecture 2: Partial Pressure, Hyperventilation, Hyperpnea

• School: York University
• Department: Kinesiology & Health Science
• Course: KINE 3012
• Professor: Michael Connor

Document Summary

Dio(cid:454)ide: atmospheric oxygen moves into lungs b/c po2 atm>po2 alveoli ----- Inhalation: alveoli carbon dioxide moved out lungs b/c pco2 alveoli > pco2, arteries have greater oxygen pressure. Oxygen passively diffused from artery to tissue: veins have lower oxygen pressure. This blood travels back to heart to be reoxygenated by lungs. Pressure across capillaries: pulmonary capillaries (alveoli -blood): Oxygen pressure gradient from alveoli to blood is 60 mmhg. Co2 partial pressure gradient from blood (46) to alveoli (40) = 6mmhg: systematic capillaries (blood to tissues/cells): Oxygen pressure gradient from blood (100) to tissue (40) = 60mmhg. Co2 pressure gradient from tissue (46) to blood (40) = 6mmhg: net diffusion: Of o2 from lungs (high) to tissues (low) Of co2 from tissues (high) to lungs (low) Heart to lungs: whe(cid:374) (cid:271)lood (cid:272)o(cid:373)es i(cid:374)to lu(cid:374)g fro(cid:373) heart, there"s a po2=40, pco2=46, when blood is exposed to alveolar air, we have a pressure gradient.