Lipolysis
Definition: Lipolysis is the reverse process, where triglycerides stored in fat tissue are broken down into free fatty acids and glycerol, which are then released into the bloodstream to be used as an energy source.
Mechanism:
1. Triglyceride Mobilization: When there is a need for energy, such as during fasting or physical activity, hormones (such as glucagon and adrenaline) signal fat cells to begin breaking down triglycerides.
2. Release of Fatty Acids: Triglycerides are broken down by lipase enzymes, releasing free fatty acids and glycerol, which can be used by muscles and other tissues for energy.
Duration: Lipolysis can also begin rapidly, often within hours of starting a fast or physical activity. The effects of lipolysis can be felt within 6 to 12 hours of starting intense exercise or fasting.
