Abstract:
:Regulation of pulmonary oxygen uptake (VO2p) during exercise depends on cellular energy demand, blood flow, ventilation, oxygen exchange across membranes, and oxygen utilization in the contracting skeletal muscle. In human and animal studies of metabolic processes that control cellular respiration in working skeletal muscle, pulmonary VO2 dynamics is measured at the mouth using indirect calorimetry. To provide information on the dynamic balance between oxygen delivery and oxygen consumption at the microvascular level, muscle oxygenation is measured using near-infrared spectroscopy. A multi-scale computational model that links O2 transport and cellular metabolism in the skeletal muscle was developed to relate the measurements and gain quantitative understanding of the regulation of VO2 at the cellular, tissue, and whole-body level. The model incorporates mechanisms of oxygen transport from the airway openings to the cell, as well as the phosphagenic and oxidative pathways of ATP synthesis in the muscle cells.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Zhou H,Lai N,Saidel GM,Cabrera MEdoi
10.1196/annals.1420.021subject
Has Abstractpub_date
2008-03-01 00:00:00pages
178-86eissn
0077-8923issn
1749-6632pii
1123/1/178journal_volume
1123pub_type
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