During a bout of high intensity exercise (i.e. ,10 minutes at 80%VO₂ max),the plasma concentration of hormones that stimulate fatty acid mobilization from adipose tissue increase significantly.The plasma-free fatty acid concentration,however,actually decreases.Why does this occur? A)Fatty acid supply is depleted. B)Hormones are ineffective in maximal work. C)Lactic acid interferes with fatty acid mobilization. D)High insulin levels secreted during maximal exercise interfere with fatty acid mobilization.

Question

Quizplus · Accepted Answer

Lactic acid produced during high-intensity exercise can interfere with the mobilization of fatty acids from adipose tissue, despite the increase in hormones that usually stimulate this process. This is because lactic acid can inhibit hormone-sensitive lipase, the enzyme responsible for breaking down triglycerides into fatty acids and glycerol, thus reducing the release of fatty acids into the plasma.

During a Bout of High Intensity Exercise (I