Final answer:
Mammalian adipocytes mobilize storage lipids and export fatty acids into the bloodstream during the postabsorptive state. Lipases in adipose tissue break down stored triacylglycerols into fatty acids and glycerol, which are released into the blood stream. These fatty acids are used by muscle or liver cells to generate ATP.
Step-by-step explanation:
Mammalian adipocytes, which are specialized cells that store lipids, mobilize storage lipids and export fatty acids into the bloodstream shortly after a period of fasting or during the postabsorptive state. When energy is needed, lipases in adipose tissue are activated to hydrolyze stored triacylglycerols into fatty acids and glycerol, which are then released into the bloodstream. These fatty acids are used by muscle or liver cells to generate acetyl-CoA and eventually ATP, providing energy for the body.