Answer;
Fat cells break down stored fat and release fatty acids into the blood.
Step-by-step explanation;
-When the body uses its energy stores to provide cellular energy during a time of fasting, when there is not enough food energy, the fat cells break down stored fat and release fatty acids into the blood.
-During short-term fasting the body burns free fatty acids from the body stores. As the muscle and liver glycogen stores become depleted, the body relies increasingly on fat to satisfy the body's energy needs.