PHYSL 210 Lecture Notes - Lecture 5: Perfusion, Blood Plasma, Venous Blood
11 Feb 2020
School
Department
Course
Professor
Document Summary
Blood leaving the lungs has less oxygen than what"s present. Perfusion: blood ow has decreased to the lung. 30% down the distance of the lung, all the oxygen you need to get into the blood has already occurred. The remaining 70% - the lungs ar overbuilt. Q: what would happen where the di usion capacity has been reduced by 50% About 50% down the length of the lung before the blood gets 100mmhg ppo2 (not 30%) No di usion limitation if d_l is 2 as well. Normal d_l but increase q by a factor of 3. A lot of blood ow (increased velocity) Now, almost at 100% capillary near ppo2 is 100. Because the blood leaving the lung still has a ppo2 of 100. D_l reduced by half and asked them to exercise. The blood leaving the lung doesn"t have ppo2 of 100. It is a di usion limitation because blood ow has not gone down it actually went up.
