Question

Name one change that occurs in runners' muscles during exercise to promote unloading of oxygen from hemoglobin for use by the muscle cells

Answer 1

formation of lactic acid

Answer 2

The affinity of hemoglobin for oxygen decreases as a function of increased acidity (lower pH) and increased temperature. The pH in working muscle decreases due the increases production of both CO₂ and lactic acid. Also, the temperature of working muscles increases.