To determine: What can account for the blood PO2 arriving at systemic capillaries with a lower PO2 value than when it left the pulmonary capillaries.
Concept introduction: When the partial pressure for a specific gas is greater in one region than in another region, a partial pressure gradient exists. If a partial pressure gradient exists between two regions for a particular gas, then the gas moves to the area of lower partial pressure gradient from the area of higher partial pressure gradient. This movement may continue until the partial pressures in both the regions become equal. The respiratory gas exchange in both systematic and alveolar gas exchanges is dependent upon partial pressure gradients.
Want to see the full answer?
Check out a sample textbook solutionChapter 23 Solutions
Loose Leaf For Anatomy & Physiology: An Integrative Approach
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education